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The Cidr Report
by CIDR Report 02 Mar '02

02 Mar '02

This is an auto-generated mail on Fri Mar 1 23:00:00 PST 2002 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for the regional version of this report. NEW: Check http://www.employees.org/~tbates/autnums.html for a complete list of autonomous system number to name mappings as used by the CIDR-Report. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to GX Networks for giving me access to their routing tables once a day. Please send any comments about this report directly to CIDR Report <cidr-report(a)cisco.com>. ------------------------------------------------------------------------------ CIDR REPORT for 01Mar02 0) General Status Table History ------------- Date Prefixes 220202 106236 230202 106385 240202 106326 250202 106519 260202 106454 270202 106725 280202 106799 010302 106896 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- *** Bogus 96.0.0.0/20 from AS3549 AS Summary ---------- Number of ASes in routing system: 12522 Number of ASes announcing only one prefix: 7615 (4306 cidr, 3309 classful) Largest number of cidr routes: 769 announced by AS701 Largest number of classful routes: 1402 announced by AS701 1) Gains by aggregating at the origin AS level --- 01Mar02 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS701 1402 1138 264 18.8% UUNET Technologies, Inc. AS1221 1140 883 257 22.5% Telstra Pty Ltd AS17557 224 96 128 57.1% Pakistan Telecom AS16473 198 77 121 61.1% Bell South AS7018 801 684 117 14.6% AT&T AS6595 162 57 105 64.8% DoD Education Activity Network As AS4151 255 150 105 41.2% USDA AS705 307 203 104 33.9% UUNET Technologies, Inc. AS852 432 329 103 23.8% Telus Advanced Communications AS7046 346 244 102 29.5% UUNET Technologies, Inc. AS577 288 192 96 33.3% Bell Advanced Communications Inc. AS19632 94 9 85 90.4% Metropolis Intercom S.A. AS12302 114 32 82 71.9% MobiFon S.A. AS2048 186 105 81 43.5% State of Louisiana AS1239 488 409 79 16.2% Sprint AS4755 226 150 76 33.6% Videsh Sanchar Nigam Ltd. Autonom AS4323 424 350 74 17.5% Time Warner Communications, Inc. AS3908 333 266 67 20.1% Supernet, Inc. AS7303 117 53 64 54.7% Telecom Argentina Stet-France Tel AS3464 157 97 60 38.2% Alabama SuperComputer Network AS724 218 159 59 27.1% DLA Systems Automation Center AS10620 79 21 58 73.4% TVCABLE BOGOTA AS16758 63 6 57 90.5% IKON Office Solutions AS226 145 89 56 38.6% Los Nettos AS1 473 417 56 11.8% BBN Planet AS19834 63 8 55 87.3% NetForce, Inc. AS9051 75 22 53 70.7% INCONET Autonomous System AS703 269 217 52 19.3% UUNET Technologies, Inc. AS702 619 567 52 8.4% UUNET Technologies, Inc. AS2149 301 249 52 17.3% Performance Systems, Inc. Total 54098 42109 11989 22.2% For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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Weekly Routing Table Report
by Routing Table Analysis 01 Mar '02

01 Mar '02

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. Daily listings are sent to bgp-stats(a)lists.apnic.net For a graphical representation, please see http://www.apnic.net/stats/bgp. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Routing Table Report 20:00 +10GMT Fri 01 Mar, 2002 Analysis Summary ---------------- BGP routing table entries examined: 109166 Prefixes after maximum aggregation: 72127 Unique aggregates announced to Internet: 51877 Total ASes present in the Internet Routing Table: 12656 Origin-only ASes present in the Internet Routing Table: 10956 Origin ASes announcing only one prefix: 4788 Transit ASes present in the Internet Routing Table: 1700 Transit-only ASes present in the Internet Routing Table: 57 Average AS path length visible in the Internet Routing Table: 5.4 Max AS path length visible: 16 Illegal AS announcements present in the Routing Table: 9 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 15 Number of addresses announced to Internet: 1170537896 Equivalent to 69 /8s, 196 /16s and 253 /24s Percentage of available address space announced: 31.6 Percentage of allocated address space announced: 59.8 Percentage of available address space allocated: 52.8 Total number of prefixes smaller than registry allocations: 73032 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 17792 Total APNIC prefixes after maximum aggregation: 10648 Prefixes being announced from the APNIC address blocks: 16359 Unique aggregates announced from the APNIC address blocks: 9952 APNIC Region origin ASes present in the Internet Routing Table: 1456 APNIC Region origin ASes announcing only one prefix: 480 APNIC Region transit ASes present in the Internet Routing Table: 253 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 15 Number of APNIC addresses announced to Internet: 80235584 Equivalent to 4 /8s, 200 /16s and 76 /24s Percentage of available APNIC address space announced: 59.3 APNIC AS Blocks 4608 - 4864, 7467 - 7722, 9216 - 10239 17408 - 18431, 23552 - 24575 APNIC Address Blocks 61/8, 202/7, 210/7, 218/7 and 220/8 ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 73100 Total ARIN prefixes after maximum aggregation: 47396 Prefixes being announced from the ARIN address blocks: 51620 Unique aggregates announced from the ARIN address blocks: 16248 ARIN Region origin ASes present in the Internet Routing Table: 7494 ARIN Region origin ASes announcing only one prefix: 2343 ARIN Region transit ASes present in the Internet Routing Table: 769 Average ARIN Region AS path length visible: 5.3 Max ARIN Region AS path length visible: 16 Number of ARIN addresses announced to Internet: 190060100 Equivalent to 11 /8s, 84 /16s and 22 /24s Percentage of available ARIN address space announced: 70.8 ARIN AS Blocks 1 - 1876, 1902 - 2042, 2044 - 2046, 2048 - 2106 2138 - 2584, 2615 - 2772, 2823 - 2829, 2880 - 3153 3354 - 4607, 4865 - 5119, 5632 - 6655, 6912 - 7466 7723 - 8191, 10240 - 12287, 13312 - 15359 16384 - 17407, 18432 - 20479, 21504 - 23551 ARIN Address Blocks 24/8, 63/8, 64/6, 68/8, 199/8, 200/8, 204/6, 208/7 and 216/8 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 18270 Total RIPE prefixes after maximum aggregation: 14083 Prefixes being announced from the RIPE address blocks: 15001 Unique aggregates announced from the RIPE address blocks: 10014 RIPE Region origin ASes present in the Internet Routing Table: 3648 RIPE Region origin ASes announcing only one prefix: 1965 RIPE Region transit ASes present in the Internet Routing Table: 665 Average RIPE Region AS path length visible: 5.9 Max RIPE Region AS path length visible: 15 Number of RIPE addresses announced to Internet: 107107488 Equivalent to 6 /8s, 98 /16s and 84 /24s Percentage of available RIPE address space announced: 70.9 RIPE AS Blocks 1877 - 1901, 2043, 2047, 2107 - 2136, 2585 - 2614 2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631 6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383 20480 - 21503, 24576 - 25599 RIPE Address Blocks 62/8, 80/7, 193/8, 194/7, 212/7 and 217/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1221 1298 1229 959 Telstra Pty Ltd 4538 457 1162 16 China Education and Research 2907 408 1975 371 SINET Japan 703 397 353 307 UUNET Technologies, Inc. 2764 385 360 361 connect.com.au pty ltd 7474 298 289 203 Optus Communications Pty Ltd 4755 297 111 86 Videsh Sanchar Nigam Ltd. Aut 4134 270 1874 98 Data Communications Bureau 9443 270 44 62 Primus Telecommunications 9394 263 112 3 CHINA RAILWAY Internet(CRNET) 17557 228 15 99 Pakistan Telecom 4766 211 1393 147 Korea Internet Exchange for " 4804 148 84 68 Microplex PTY LTD 9768 147 385 89 Korea Telecom 9583 142 32 5 Satyam Infoway Ltd., 7539 134 215 131 TANet2, sponsored by NSC, TAI 4713 127 914 104 NTT Communications Corporatio 7657 122 22 85 The Internet Group Limited 4780 120 186 40 Digital United Inc. 17676 115 1840 17 XTAGE CORPORATION RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 1062 2618 856 UUNET Technologies, Inc. 3301 397 924 351 TeliaNet Sweden 3215 259 570 156 France Telecom / &Equant 1257 244 487 240 SWIPnet Swedish IP Network 680 231 2147 230 DFN-IP service G-WiN 5515 217 713 174 Sonera Finland Autonomous Sys 5400 201 82 93 Concert European Core Network 3320 195 1964 171 Deutsche Telekom AG 786 181 1858 181 The JANET IP Service 719 164 289 119 LANLINK autonomous system 8708 161 22 147 Romania Data Systems S.A. 2856 131 790 120 BTnet UK Regional network 3303 123 577 123 Swisscom Ltd 12302 118 7 36 MobiFon S.A. 3269 117 693 71 TELECOM ITALIA 8297 114 40 65 Teleglobe Autonomous System i 517 100 226 98 KPNQwest Germany GmbH 2874 95 100 35 Global One Services AB 5511 89 192 78 France Telecom 5536 89 13 25 Internet Egypt Network ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 701 2176 8501 1518 UUNET Technologies, Inc. 7018 1202 7492 903 AT&T 3908 849 1660 477 Supernet, Inc. 1 824 8103 598 BBN Planet 1239 801 3364 623 Sprint 4323 644 435 257 Time Warner Communications, I 7046 644 838 421 UUNET Technologies, Inc. 852 618 1119 408 Telus Advanced Communications 209 536 2007 313 Qwest 3549 478 844 242 Global Crossing 7132 456 511 165 Southwestern Bell Internet Se 2914 446 2144 413 Verio, Inc. 690 439 67 285 Merit Network 7843 382 302 48 Adelphia Corp. 705 377 117 267 UUNET Technologies, Inc. 2149 368 208 306 Performance Systems, Inc. 3741 344 731 235 The Internet Solution 2386 334 355 191 AT&T Data Communications Serv 3561 334 2171 299 Cable & Wireless USA 6197 326 214 166 BellSouth Network Solutions, Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 4538 457 441 China Education and Research 4323 644 387 Time Warner Communications, I 3908 849 372 Supernet, Inc. 1221 1298 339 Telstra Pty Ltd 7843 382 334 Adelphia Corp. 7018 1202 299 AT&T 7132 456 291 Southwestern Bell Internet Se 4151 306 290 USDA 6198 307 274 BellSouth Network Solutions, 11371 278 272 Rhythms NetConnections 9394 263 260 CHINA RAILWAY Internet(CRNET) 6347 315 237 SAVVIS Communications Corpora 3549 478 236 Global Crossing 7029 244 229 Alltel Information Services, 1 824 226 BBN Planet 7046 644 223 UUNET Technologies, Inc. 209 536 223 Qwest 4755 297 211 Videsh Sanchar Nigam Ltd. Aut 852 618 210 Telus Advanced Communications 9443 270 208 Primus Telecommunications List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies, 23309 UNALLOCATED 209.79.154.0/23 2150 California State Uni 23309 UNALLOCATED 209.79.156.0/23 2150 California State Uni 23309 UNALLOCATED 209.132.144.0/24 2150 California State Uni 23309 UNALLOCATED 209.232.36.0/22 2150 California State Uni 65534 PRIVATE 209.242.165.32/27 195 San Diego Supercompu 65534 PRIVATE 209.242.166.0/26 195 San Diego Supercompu 65534 PRIVATE 209.242.166.72/29 195 San Diego Supercompu 65534 PRIVATE 209.242.166.80/28 195 San Diego Supercompu Advertised Unregistered Addresses --------------------------------- Network Origin AS Description 39.0.0.0/8 4554 Exchange Point Blocks 96.0.0.0/20 3549 Global Crossing 132.0.0.0/10 568 DISO-UNRRA 134.137.0.0/16 7170 AT&T Government Markets 135.0.0.0/13 10455 Lucent Technologies 137.0.0.0/13 568 DISO-UNRRA 138.94.0.0/16 1 BBN Planet 144.7.0.0/16 701 UUNET Technologies, Inc. 153.36.0.0/14 701 UUNET Technologies, Inc. 154.150.0.0/16 6494 IDCI 158.0.0.0/13 568 DISO-UNRRA 164.233.0.0/16 6020 DISA NETWORK SERVICES 164.235.0.0/16 6025 US DOD NIC Unregistered 189.186.184.0/24 4471 Michigan Internet Cooperative 201.115.100.0/24 7018 AT&T Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:19 /9:6 /10:8 /11:12 /12:34 /13:88 /14:233 /15:404 /16:7167 /17:1377 /18:2530 /19:7351 /20:6858 /21:4854 /22:7425 /23:9095 /24:60760 /25:214 /26:257 /27:123 /28:93 /29:93 /30:127 /31:0 /32:38 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 701 1410 2176 UUNET Technologies, Inc. 1221 1154 1298 Telstra Pty Ltd 702 685 1062 UUNET Technologies, Inc. 7018 623 1202 AT&T 3908 588 849 Supernet, Inc. 4323 515 644 Time Warner Communications, I 1239 465 801 Sprint 7046 459 644 UUNET Technologies, Inc. 690 435 439 Merit Network 1 429 824 BBN Planet 852 375 618 Telus Advanced Communications 209 351 536 Qwest 2764 341 385 connect.com.au pty ltd 3549 340 478 Global Crossing 703 322 397 UUNET Technologies, Inc. 705 322 377 UUNET Technologies, Inc. 2149 279 368 Performance Systems, Inc. 6197 275 326 BellSouth Network Solutions, 7066 273 302 Virginia Polytechnic Institut 11371 272 278 Rhythms NetConnections Number of /24s announced per /8 block (Global) ---------------------------------------------- 3:1 9:1 12:489 13:10 15:1 17:5 20:2 24:778 25:1 32:68 38:9 40:6 44:1 57:15 61:237 62:175 63:1878 64:1130 65:1052 66:735 67:49 68:7 80:208 81:4 128:62 129:123 130:23 131:56 132:11 133:3 134:127 135:10 136:250 137:101 138:143 139:48 140:176 141:62 142:82 143:37 144:151 145:13 146:217 147:163 148:148 149:91 150:41 151:48 152:346 153:31 154:7 155:89 156:75 157:119 158:79 159:116 160:23 161:55 162:140 163:117 164:91 165:115 166:223 167:184 168:118 169:49 170:272 171:2 189:1 192:5425 193:2189 194:2090 195:788 196:432 198:3727 199:3233 200:2368 201:1 202:3037 203:4533 204:3317 205:2172 206:2515 207:2618 208:2562 209:2791 210:550 211:196 212:891 213:571 214:9 215:18 216:2949 217:457 218:21 End of report

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The Cidr Report
by CIDR Report 23 Feb '02

23 Feb '02

This is an auto-generated mail on Fri Feb 22 23:00:00 PST 2002 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for the regional version of this report. NEW: Check http://www.employees.org/~tbates/autnums.html for a complete list of autonomous system number to name mappings as used by the CIDR-Report. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to GX Networks for giving me access to their routing tables once a day. Please send any comments about this report directly to CIDR Report <cidr-report(a)cisco.com>. ------------------------------------------------------------------------------ CIDR REPORT for 22Feb02 0) General Status Table History ------------- Date Prefixes 150202 105693 160202 105736 170202 105803 180202 105879 190202 105989 200202 106186 210202 105821 220202 106236 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- *** Bogus 96.0.0.0/20 from AS3549 AS Summary ---------- Number of ASes in routing system: 12451 Number of ASes announcing only one prefix: 7566 (4299 cidr, 3267 classful) Largest number of cidr routes: 728 announced by AS701 Largest number of classful routes: 1369 announced by AS701 1) Gains by aggregating at the origin AS level --- 22Feb02 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS1221 1150 886 264 23.0% Telstra Pty Ltd AS701 1369 1125 244 17.8% UUNET Technologies, Inc. AS17557 224 96 128 57.1% Pakistan Telecom AS7018 836 712 124 14.8% AT&T AS577 320 197 123 38.4% Bell Advanced Communications Inc. AS16473 198 77 121 61.1% Bell South AS4151 254 149 105 41.3% USDA AS705 309 205 104 33.7% UUNET Technologies, Inc. AS852 425 324 101 23.8% Telus Advanced Communications AS6595 150 55 95 63.3% DoD Education Activity Network As AS7046 324 239 85 26.2% UUNET Technologies, Inc. AS19632 94 9 85 90.4% Metropolis Intercom S.A. AS2048 186 105 81 43.5% State of Louisiana AS12302 110 31 79 71.8% MobiFon S.A. AS1239 482 405 77 16.0% Sprint AS4323 432 356 76 17.6% Time Warner Communications, Inc. AS4755 221 147 74 33.5% Videsh Sanchar Nigam Ltd. Autonom AS3908 339 271 68 20.1% Supernet, Inc. AS3464 157 97 60 38.2% Alabama SuperComputer Network AS724 215 156 59 27.4% DLA Systems Automation Center AS7303 106 48 58 54.7% Telecom Argentina Stet-France Tel AS16758 63 6 57 90.5% IKON Office Solutions AS226 145 89 56 38.6% Los Nettos AS19834 63 8 55 87.3% NetForce, Inc. AS10620 77 22 55 71.4% TVCABLE BOGOTA AS9051 75 22 53 70.7% INCONET Autonomous System AS702 621 568 53 8.5% UUNET Technologies, Inc. AS703 271 219 52 19.2% UUNET Technologies, Inc. AS2149 305 253 52 17.0% Performance Systems, Inc. AS209 300 248 52 17.3% Qwest Total 53958 42075 11883 22.0% For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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Weekly Routing Table Report
by Routing Table Analysis 22 Feb '02

22 Feb '02

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. Daily listings are sent to bgp-stats(a)lists.apnic.net For a graphical representation, please see http://www.apnic.net/stats/bgp. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Routing Table Report 20:00 +10GMT Fri 22 Feb, 2002 Analysis Summary ---------------- BGP routing table entries examined: 108511 Prefixes after maximum aggregation: 71931 Unique aggregates announced to Internet: 51754 Total ASes present in the Internet Routing Table: 12591 Origin-only ASes present in the Internet Routing Table: 10899 Origin ASes announcing only one prefix: 4778 Transit ASes present in the Internet Routing Table: 1692 Transit-only ASes present in the Internet Routing Table: 58 Average AS path length visible in the Internet Routing Table: 5.4 Max AS path length visible: 16 Illegal AS announcements present in the Routing Table: 2 Non-routable prefixes present in the Routing Table: 1 Prefixes being announced from the IANA Reserved Address blocks: 15 Number of addresses announced to Internet: 1174523208 Equivalent to 70 /8s, 1 /16s and 205 /24s Percentage of available address space announced: 31.7 Percentage of allocated address space announced: 60.0 Percentage of available address space allocated: 52.8 Total number of prefixes smaller than registry allocations: 72403 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 17358 Total APNIC prefixes after maximum aggregation: 10557 Prefixes being announced from the APNIC address blocks: 15867 Unique aggregates announced from the APNIC address blocks: 9799 APNIC Region origin ASes present in the Internet Routing Table: 1445 APNIC Region origin ASes announcing only one prefix: 491 APNIC Region transit ASes present in the Internet Routing Table: 255 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 15 Number of APNIC addresses announced to Internet: 79641920 Equivalent to 4 /8s, 191 /16s and 61 /24s Percentage of available APNIC address space announced: 58.9 APNIC AS Blocks 4608 - 4864, 7467 - 7722, 9216 - 10239 17408 - 18431, 23552 - 24575 APNIC Address Blocks 61/8, 202/7, 210/7, 218/7 and 220/8 ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 72928 Total ARIN prefixes after maximum aggregation: 47301 Prefixes being announced from the ARIN address blocks: 51446 Unique aggregates announced from the ARIN address blocks: 16297 ARIN Region origin ASes present in the Internet Routing Table: 7449 ARIN Region origin ASes announcing only one prefix: 2322 ARIN Region transit ASes present in the Internet Routing Table: 766 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 16 Number of ARIN addresses announced to Internet: 194750084 Equivalent to 11 /8s, 155 /16s and 166 /24s Percentage of available ARIN address space announced: 72.6 ARIN AS Blocks 1 - 1876, 1902 - 2042, 2044 - 2046, 2048 - 2106 2138 - 2584, 2615 - 2772, 2823 - 2829, 2880 - 3153 3354 - 4607, 4865 - 5119, 5632 - 6655, 6912 - 7466 7723 - 8191, 10240 - 12287, 13312 - 15359 16384 - 17407, 18432 - 20479, 21504 - 23551 ARIN Address Blocks 24/8, 63/8, 64/6, 68/8, 199/8, 200/8, 204/6, 208/7 and 216/8 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 18225 Total RIPE prefixes after maximum aggregation: 14073 Prefixes being announced from the RIPE address blocks: 14981 Unique aggregates announced from the RIPE address blocks: 9993 RIPE Region origin ASes present in the Internet Routing Table: 3638 RIPE Region origin ASes announcing only one prefix: 1965 RIPE Region transit ASes present in the Internet Routing Table: 660 Average RIPE Region AS path length visible: 5.8 Max RIPE Region AS path length visible: 15 Number of RIPE addresses announced to Internet: 106891520 Equivalent to 6 /8s, 95 /16s and 9 /24s Percentage of available RIPE address space announced: 70.8 RIPE AS Blocks 1877 - 1901, 2043, 2047, 2107 - 2136, 2585 - 2614 2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631 6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383 20480 - 21503, 24576 - 25599 RIPE Address Blocks 62/8, 80/7, 193/8, 194/7, 212/7 and 217/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1221 1311 1246 963 Telstra Pty Ltd 4538 454 1162 16 China Education and Research 703 402 359 311 UUNET Technologies, Inc. 2907 399 1942 365 SINET Japan 2764 387 361 362 connect.com.au pty ltd 7474 302 290 206 Optus Communications Pty Ltd 4755 290 111 88 Videsh Sanchar Nigam Ltd. Aut 4134 270 1874 98 Data Communications Bureau 9394 253 112 3 CHINA RAILWAY Internet(CRNET) 17557 226 17 95 Pakistan Telecom 4766 213 1392 151 Korea Internet Exchange for " 7539 162 220 155 TANet2, sponsored by NSC, TAI 9443 162 44 60 Primus Telecommunications 9768 146 385 88 Korea Telecom 4804 144 84 68 Microplex PTY LTD 9583 140 32 5 Satyam Infoway Ltd., 7657 122 22 85 The Internet Group Limited 4780 118 186 40 Digital United Inc. 4713 117 914 103 NTT Communications Corporatio 17676 115 1840 17 XTAGE CORPORATION RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 1063 2631 856 UUNET Technologies, Inc. 3301 398 924 352 TeliaNet Sweden 1257 247 487 243 SWIPnet Swedish IP Network 3215 238 570 155 France Telecom / &Equant 680 232 2147 230 DFN-IP service G-WiN 5515 217 713 174 Sonera Finland Autonomous Sys 5400 197 82 93 Concert European Core Network 3320 196 1964 172 Deutsche Telekom AG 786 181 1858 181 The JANET IP Service 719 167 305 121 LANLINK autonomous system 8708 157 22 145 Romania Data Systems S.A. 2856 131 790 120 BTnet UK Regional network 2118 126 109 20 EUnet/RELCOM Autonomous Syste 3303 123 577 123 Swisscom Ltd 3269 117 693 71 TELECOM ITALIA 8297 116 40 65 Teleglobe Autonomous System i 12302 114 7 35 MobiFon S.A. 517 100 226 98 KPNQwest Germany GmbH 5536 97 13 25 Internet Egypt Network 2874 95 100 35 Global One Services AB ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 701 2106 8443 1503 UUNET Technologies, Inc. 7018 1237 7511 932 AT&T 3908 834 1661 481 Supernet, Inc. 1 817 8102 596 BBN Planet 1239 805 3348 621 Sprint 4323 658 434 257 Time Warner Communications, I 7046 616 850 416 UUNET Technologies, Inc. 852 614 1127 410 Telus Advanced Communications 209 537 1974 309 Qwest 7132 455 510 164 Southwestern Bell Internet Se 2914 453 2193 421 Verio, Inc. 3549 451 807 234 Global Crossing 690 437 66 283 Merit Network 7843 377 298 47 Adelphia Corp. 705 373 114 263 UUNET Technologies, Inc. 2149 373 209 311 Performance Systems, Inc. 577 353 588 221 Bell Advanced Communications 3561 350 2204 310 Cable & Wireless USA 3741 343 730 234 The Internet Solution 2386 332 354 189 AT&T Data Communications Serv Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 4538 454 438 China Education and Research 4323 658 401 Time Warner Communications, I 3908 834 353 Supernet, Inc. 1221 1311 348 Telstra Pty Ltd 7843 377 330 Adelphia Corp. 7018 1237 305 AT&T 7132 455 291 Southwestern Bell Internet Se 4151 305 289 USDA 6198 307 274 BellSouth Network Solutions, 11371 279 272 Rhythms NetConnections 9394 253 250 CHINA RAILWAY Internet(CRNET) 6347 316 238 SAVVIS Communications Corpora 7029 244 229 Alltel Information Services, 209 537 228 Qwest 1 817 221 BBN Planet 3549 451 217 Global Crossing 702 1063 207 UUNET Technologies, Inc. 852 614 204 Telus Advanced Communications 4355 243 204 EarthLink, Inc. 4755 290 202 Videsh Sanchar Nigam Ltd. Aut List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 1877 UNALLOCATED 192.108.201.0/24 1880 Stupi, house man's p 5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies, Prefixes from private and non-routed address space (Global) ----------------------------------------------------------- Prefix Origin AS Description 172.16.0.0/12 9367 Tokyo Institute of Technology Advertised Unregistered Addresses --------------------------------- Network Origin AS Description 39.0.0.0/8 4554 Exchange Point Blocks 96.0.0.0/20 3549 Global Crossing 132.0.0.0/10 568 DISO-UNRRA 134.137.0.0/16 7170 AT&T Government Markets 135.0.0.0/13 10455 Lucent Technologies 137.0.0.0/13 568 DISO-UNRRA 138.94.0.0/16 1 BBN Planet 144.7.0.0/16 701 UUNET Technologies, Inc. 153.36.0.0/14 701 UUNET Technologies, Inc. 154.150.0.0/16 6494 IDCI 158.0.0.0/13 568 DISO-UNRRA 164.233.0.0/16 6020 DISA NETWORK SERVICES 164.235.0.0/16 6025 US DOD NIC Unregistered 189.186.184.0/24 4471 Michigan Internet Cooperative 201.115.100.0/24 7018 AT&T Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:19 /9:6 /10:8 /11:12 /12:38 /13:90 /14:233 /15:396 /16:7146 /17:1433 /18:2528 /19:7364 /20:6760 /21:4801 /22:7291 /23:8889 /24:60555 /25:216 /26:260 /27:120 /28:87 /29:91 /30:130 /31:0 /32:38 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 701 1351 2106 UUNET Technologies, Inc. 1221 1166 1311 Telstra Pty Ltd 702 687 1063 UUNET Technologies, Inc. 7018 652 1237 AT&T 3908 589 834 Supernet, Inc. 4323 537 658 Time Warner Communications, I 1239 472 805 Sprint 690 433 437 Merit Network 7046 433 616 UUNET Technologies, Inc. 1 420 817 BBN Planet 852 372 614 Telus Advanced Communications 209 355 537 Qwest 2764 343 387 connect.com.au pty ltd 703 324 402 UUNET Technologies, Inc. 705 320 373 UUNET Technologies, Inc. 3549 318 451 Global Crossing 2149 282 373 Performance Systems, Inc. 7066 276 305 Virginia Polytechnic Institut 6197 275 326 BellSouth Network Solutions, 11371 273 279 Rhythms NetConnections Number of /24s announced per /8 block (Global) ---------------------------------------------- 3:1 9:1 12:481 13:10 15:1 17:5 20:2 24:771 25:1 32:68 38:9 40:6 44:1 57:14 61:230 62:171 63:1880 64:1128 65:1032 66:721 67:34 68:7 80:204 81:5 128:62 129:123 130:21 131:57 132:11 133:3 134:128 135:10 136:247 137:101 138:148 139:47 140:185 141:62 142:88 143:37 144:152 145:12 146:216 147:156 148:146 149:92 150:39 151:45 152:352 153:32 154:7 155:85 156:75 157:121 158:78 159:89 160:23 161:55 162:139 163:115 164:95 165:120 166:225 167:182 168:119 169:51 170:293 171:2 189:1 192:5436 193:2180 194:2103 195:817 196:443 198:3741 199:3236 200:2318 201:1 202:2906 203:4459 204:3337 205:2174 206:2526 207:2626 208:2570 209:2820 210:528 211:184 212:895 213:567 214:9 215:18 216:2969 217:452 218:10 End of report

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The Cidr Report
by CIDR Report 16 Feb '02

16 Feb '02

This is an auto-generated mail on Fri Feb 15 23:00:00 PST 2002 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for the regional version of this report. NEW: Check http://www.employees.org/~tbates/autnums.html for a complete list of autonomous system number to name mappings as used by the CIDR-Report. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to GX Networks for giving me access to their routing tables once a day. Please send any comments about this report directly to CIDR Report <cidr-report(a)cisco.com>. ------------------------------------------------------------------------------ CIDR REPORT for 15Feb02 0) General Status Table History ------------- Date Prefixes 080202 105598 090202 105704 100202 105732 110202 105576 120202 105729 130202 105810 140202 105555 150202 105693 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- *** Bogus 96.0.0.0/20 from AS3549 AS Summary ---------- Number of ASes in routing system: 12420 Number of ASes announcing only one prefix: 7568 (4308 cidr, 3260 classful) Largest number of cidr routes: 722 announced by AS701 Largest number of classful routes: 1371 announced by AS701 1) Gains by aggregating at the origin AS level --- 15Feb02 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS1221 1152 889 263 22.8% Telstra Pty Ltd AS701 1371 1126 245 17.9% UUNET Technologies, Inc. AS577 324 198 126 38.9% Bell Advanced Communications Inc. AS16473 198 77 121 61.1% Bell South AS7018 821 703 118 14.4% AT&T AS6595 172 60 112 65.1% DoD Education Activity Network As AS4151 253 148 105 41.5% USDA AS705 307 203 104 33.9% UUNET Technologies, Inc. AS852 427 326 101 23.7% Telus Advanced Communications AS7046 318 232 86 27.0% UUNET Technologies, Inc. AS19632 94 9 85 90.4% Metropolis Intercom S.A. AS2048 186 105 81 43.5% State of Louisiana AS12302 111 32 79 71.2% MobiFon S.A. AS1239 479 403 76 15.9% Sprint AS4323 416 344 72 17.3% Time Warner Communications, Inc. AS3908 337 270 67 19.9% Supernet, Inc. AS4755 192 129 63 32.8% Videsh Sanchar Nigam Ltd. Autonom AS3464 157 97 60 38.2% Alabama SuperComputer Network AS703 275 216 59 21.5% UUNET Technologies, Inc. AS7303 107 49 58 54.2% Telecom Argentina Stet-France Tel AS724 212 154 58 27.4% DLA Systems Automation Center AS16758 63 6 57 90.5% IKON Office Solutions AS226 145 89 56 38.6% Los Nettos AS19834 63 8 55 87.3% NetForce, Inc. AS10620 77 22 55 71.4% TVCABLE BOGOTA AS702 624 570 54 8.7% UUNET Technologies, Inc. AS209 302 250 52 17.2% Qwest AS1 478 426 52 10.9% BBN Planet AS9051 74 23 51 68.9% INCONET Autonomous System AS2149 304 253 51 16.8% Performance Systems, Inc. Total 53554 41894 11660 21.8% For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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Weekly Routing Table Report
by Routing Table Analysis 15 Feb '02

15 Feb '02

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. Daily listings are sent to bgp-stats(a)lists.apnic.net For a graphical representation, please see http://www.apnic.net/stats/bgp. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Routing Table Report 20:00 +10GMT Fri 15 Feb, 2002 Analysis Summary ---------------- BGP routing table entries examined: 107865 Prefixes after maximum aggregation: 71870 Unique aggregates announced to Internet: 51605 Total ASes present in the Internet Routing Table: 12551 Origin-only ASes present in the Internet Routing Table: 10860 Origin ASes announcing only one prefix: 4759 Transit ASes present in the Internet Routing Table: 1691 Transit-only ASes present in the Internet Routing Table: 55 Average AS path length visible in the Internet Routing Table: 5.4 Max AS path length visible: 19 Illegal AS announcements present in the Routing Table: 2 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 14 Number of addresses announced to Internet: 1172878088 Equivalent to 69 /8s, 232 /16s and 179 /24s Percentage of available address space announced: 31.6 Percentage of allocated address space announced: 59.9 Percentage of available address space allocated: 52.8 Total number of prefixes smaller than registry allocations: 71809 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 17369 Total APNIC prefixes after maximum aggregation: 10575 Prefixes being announced from the APNIC address blocks: 15870 Unique aggregates announced from the APNIC address blocks: 9270 APNIC Region origin ASes present in the Internet Routing Table: 1446 APNIC Region origin ASes announcing only one prefix: 480 APNIC Region transit ASes present in the Internet Routing Table: 254 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 15 Number of APNIC addresses announced to Internet: 83565888 Equivalent to 4 /8s, 251 /16s and 29 /24s Percentage of available APNIC address space announced: 61.8 APNIC AS Blocks 4608 - 4864, 7467 - 7722, 9216 - 10239 17408 - 18431, 23552 - 24575 APNIC Address Blocks 61/8, 202/7, 210/7, 218/7 and 220/8 ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 72603 Total ARIN prefixes after maximum aggregation: 47272 Prefixes being announced from the ARIN address blocks: 51295 Unique aggregates announced from the ARIN address blocks: 17275 ARIN Region origin ASes present in the Internet Routing Table: 7429 ARIN Region origin ASes announcing only one prefix: 2313 ARIN Region transit ASes present in the Internet Routing Table: 768 Average ARIN Region AS path length visible: 5.2 Max ARIN Region AS path length visible: 16 Number of ARIN addresses announced to Internet: 186573124 Equivalent to 11 /8s, 30 /16s and 225 /24s Percentage of available ARIN address space announced: 69.5 ARIN AS Blocks 1 - 1876, 1902 - 2042, 2044 - 2046, 2048 - 2106 2138 - 2584, 2615 - 2772, 2823 - 2829, 2880 - 3153 3354 - 4607, 4865 - 5119, 5632 - 6655, 6912 - 7466 7723 - 8191, 10240 - 12287, 13312 - 15359 16384 - 17407, 18432 - 20479, 21504 - 23551 ARIN Address Blocks 24/8, 63/8, 64/6, 68/8, 199/8, 200/8, 204/6, 208/7 and 216/8 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 17893 Total RIPE prefixes after maximum aggregation: 14023 Prefixes being announced from the RIPE address blocks: 14698 Unique aggregates announced from the RIPE address blocks: 9419 RIPE Region origin ASes present in the Internet Routing Table: 3620 RIPE Region origin ASes announcing only one prefix: 1966 RIPE Region transit ASes present in the Internet Routing Table: 655 Average RIPE Region AS path length visible: 5.8 Max RIPE Region AS path length visible: 19 Number of RIPE addresses announced to Internet: 110064128 Equivalent to 6 /8s, 143 /16s and 114 /24s Percentage of available RIPE address space announced: 72.9 RIPE AS Blocks 1877 - 1901, 2043, 2047, 2107 - 2136, 2585 - 2614 2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631 6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383 20480 - 21503, 24576 - 25599 RIPE Address Blocks 62/8, 80/7, 193/8, 194/7, 212/7 and 217/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1221 1314 1258 959 Telstra Pty Ltd 4538 454 1162 16 China Education and Research 703 403 359 309 UUNET Technologies, Inc. 2907 399 1942 366 SINET Japan 2764 389 361 364 connect.com.au pty ltd 7474 300 289 203 Optus Communications Pty Ltd 4134 270 1874 98 Data Communications Bureau 4755 265 111 82 Videsh Sanchar Nigam Ltd. Aut 9394 243 112 3 CHINA RAILWAY Internet(CRNET) 4766 205 1393 145 Korea Internet Exchange for " 7539 161 204 155 TANet2, sponsored by NSC, TAI 9443 157 44 58 Primus Telecommunications 9768 146 385 88 Korea Telecom 4804 144 84 68 Microplex PTY LTD 9583 134 32 5 Satyam Infoway Ltd., 7657 122 22 85 The Internet Group Limited 4713 117 914 103 NTT Communications Corporatio 4780 115 186 40 Digital United Inc. 9800 115 4231 13 CHINA UNICOM 17676 115 1840 17 XTAGE CORPORATION RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 1073 2617 860 UUNET Technologies, Inc. 3301 398 924 351 TeliaNet Sweden 1257 256 487 247 SWIPnet Swedish IP Network 3215 242 570 156 France Telecom / &Equant 680 232 2147 230 DFN-IP service G-WiN 5515 214 689 172 Sonera Finland Autonomous Sys 5400 200 83 95 Concert European Core Network 3320 196 1964 172 Deutsche Telekom AG 786 182 1874 182 The JANET IP Service 719 167 305 121 LANLINK autonomous system 8708 155 21 144 Romania Data Systems S.A. 2856 130 790 119 BTnet UK Regional network 3303 123 577 123 Swisscom Ltd 3269 117 693 71 TELECOM ITALIA 12302 115 7 36 MobiFon S.A. 8297 114 40 64 Teleglobe Autonomous System i 517 100 226 98 KPNQwest Germany GmbH 5511 94 193 83 France Telecom 1267 91 1471 41 Infostrada S.p.A. 2830 89 210 71 UUNET Dual-Homed customers ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 701 2105 8429 1502 UUNET Technologies, Inc. 7018 1230 7498 929 AT&T 3908 828 1676 479 Supernet, Inc. 1 827 8103 599 BBN Planet 1239 806 3340 622 Sprint 4323 648 433 243 Time Warner Communications, I 852 615 1125 407 Telus Advanced Communications 7046 612 849 413 UUNET Technologies, Inc. 209 535 1908 305 Qwest 7132 456 510 164 Southwestern Bell Internet Se 2914 452 2193 420 Verio, Inc. 3549 438 821 224 Global Crossing 690 437 66 283 Merit Network 705 383 114 271 UUNET Technologies, Inc. 2149 374 209 313 Performance Systems, Inc. 3561 365 2220 320 Cable & Wireless USA 577 353 588 219 Bell Advanced Communications 7843 349 290 50 Adelphia Corp. 3741 344 730 235 The Internet Solution 2386 333 355 191 AT&T Data Communications Serv Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 4538 454 438 China Education and Research 4323 648 405 Time Warner Communications, I 1221 1314 355 Telstra Pty Ltd 3908 828 349 Supernet, Inc. 7018 1230 301 AT&T 7843 349 299 Adelphia Corp. 7132 456 292 Southwestern Bell Internet Se 4151 304 288 USDA 11371 278 271 Rhythms NetConnections 9394 243 240 CHINA RAILWAY Internet(CRNET) 6347 316 238 SAVVIS Communications Corpora 209 535 230 Qwest 1 827 228 BBN Planet 3549 438 214 Global Crossing 702 1073 213 UUNET Technologies, Inc. 852 615 208 Telus Advanced Communications 4355 244 205 EarthLink, Inc. 6198 301 204 BellSouth Network Solutions, 1580 211 200 HQ, 5th Signal Command 7046 612 199 UUNET Technologies, Inc. List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 1877 UNALLOCATED 192.108.201.0/24 1880 Stupi, house man's p 5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies, Advertised Unregistered Addresses --------------------------------- Network Origin AS Description 39.0.0.0/8 4554 Exchange Point Blocks 96.0.0.0/20 3549 Global Crossing 132.0.0.0/10 568 DISO-UNRRA 134.137.0.0/16 7170 AT&T Government Markets 135.0.0.0/13 10455 Lucent Technologies 137.0.0.0/13 568 DISO-UNRRA 138.94.0.0/16 1 BBN Planet 144.7.0.0/16 701 UUNET Technologies, Inc. 153.36.0.0/14 701 UUNET Technologies, Inc. 154.150.0.0/16 6494 IDCI 158.0.0.0/13 568 DISO-UNRRA 164.233.0.0/16 6020 DISA NETWORK SERVICES 164.235.0.0/16 6025 US DOD NIC Unregistered 201.115.100.0/24 7018 AT&T Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:20 /9:6 /10:7 /11:12 /12:37 /13:91 /14:231 /15:394 /16:7146 /17:1430 /18:2506 /19:7380 /20:6738 /21:4794 /22:7273 /23:8918 /24:59954 /25:220 /26:251 /27:121 /28:85 /29:85 /30:125 /31:0 /32:41 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 701 1354 2105 UUNET Technologies, Inc. 1221 1168 1314 Telstra Pty Ltd 702 698 1073 UUNET Technologies, Inc. 7018 644 1230 AT&T 3908 582 828 Supernet, Inc. 4323 529 648 Time Warner Communications, I 1239 476 806 Sprint 7046 437 612 UUNET Technologies, Inc. 690 433 437 Merit Network 1 426 827 BBN Planet 852 374 615 Telus Advanced Communications 209 356 535 Qwest 2764 345 389 connect.com.au pty ltd 705 330 383 UUNET Technologies, Inc. 703 327 403 UUNET Technologies, Inc. 3549 306 438 Global Crossing 2149 283 374 Performance Systems, Inc. 6197 275 328 BellSouth Network Solutions, 7066 275 304 Virginia Polytechnic Institut 11371 272 278 Rhythms NetConnections Number of /24s announced per /8 block (Global) ---------------------------------------------- 4:1 9:1 12:482 13:10 15:1 17:5 20:5 24:750 25:1 32:68 38:9 40:6 44:1 57:14 61:227 62:170 63:1886 64:1109 65:1031 66:695 67:33 68:5 80:188 81:4 128:63 129:120 130:21 131:57 132:11 133:3 134:128 135:10 136:245 137:106 138:148 139:47 140:162 141:61 142:67 143:37 144:155 145:12 146:217 147:154 148:146 149:91 150:40 151:45 152:302 153:32 154:7 155:83 156:77 157:82 158:81 159:88 160:24 161:54 162:102 163:114 164:94 165:124 166:222 167:168 168:114 169:49 170:292 171:2 192:5423 193:2116 194:2010 195:784 196:445 198:3736 199:3239 200:2319 201:1 202:2889 203:4436 204:3312 205:2163 206:2534 207:2619 208:2574 209:2829 210:531 211:158 212:882 213:558 214:9 215:18 216:2962 217:438 218:10 End of report

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The Cidr Report
by CIDR Report 09 Feb '02

09 Feb '02

This is an auto-generated mail on Fri Feb 8 23:00:00 PST 2002 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for the regional version of this report. NEW: Check http://www.employees.org/~tbates/autnums.html for a complete list of autonomous system number to name mappings as used by the CIDR-Report. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to GX Networks for giving me access to their routing tables once a day. Please send any comments about this report directly to CIDR Report <cidr-report(a)cisco.com>. ------------------------------------------------------------------------------ CIDR REPORT for 08Feb02 0) General Status Table History ------------- Date Prefixes 010202 105568 020202 105595 030202 105578 040202 105667 050202 105600 060202 105584 070202 105721 080202 105598 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- *** Bogus 96.0.0.0/20 from AS3549 AS Summary ---------- Number of ASes in routing system: 12381 Number of ASes announcing only one prefix: 7537 (4280 cidr, 3257 classful) Largest number of cidr routes: 717 announced by AS701 Largest number of classful routes: 1357 announced by AS701 1) Gains by aggregating at the origin AS level --- 08Feb02 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS1221 1156 892 264 22.8% Telstra Pty Ltd AS701 1357 1126 231 17.0% UUNET Technologies, Inc. AS577 323 197 126 39.0% Bell Advanced Communications Inc. AS16473 198 77 121 61.1% Bell South AS7018 821 703 118 14.4% AT&T AS4151 261 149 112 42.9% USDA AS6595 168 60 108 64.3% DoD Education Activity Network As AS17557 195 88 107 54.9% Pakistan Telecom AS705 293 189 104 35.5% UUNET Technologies, Inc. AS852 425 325 100 23.5% Telus Advanced Communications AS7046 329 230 99 30.1% UUNET Technologies, Inc. AS19632 94 9 85 90.4% Metropolis Intercom S.A. AS2048 185 105 80 43.2% State of Louisiana AS12302 110 31 79 71.8% MobiFon S.A. AS1239 475 398 77 16.2% Sprint AS4755 221 150 71 32.1% Videsh Sanchar Nigam Ltd. Autonom AS4323 406 340 66 16.3% Time Warner Communications, Inc. AS703 279 217 62 22.2% UUNET Technologies, Inc. AS3464 157 97 60 38.2% Alabama SuperComputer Network AS7303 107 49 58 54.2% Telecom Argentina Stet-France Tel AS724 209 151 58 27.8% DLA Systems Automation Center AS16758 63 6 57 90.5% IKON Office Solutions AS3908 320 264 56 17.5% Supernet, Inc. AS226 145 89 56 38.6% Los Nettos AS13999 70 14 56 80.0% Mega Cable S.A. de C.V. AS19834 63 8 55 87.3% NetForce, Inc. AS702 654 600 54 8.3% UUNET Technologies, Inc. AS1 491 438 53 10.8% BBN Planet AS2149 308 256 52 16.9% Performance Systems, Inc. AS9051 73 22 51 69.9% INCONET Autonomous System Total 53855 42131 11724 21.8% For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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Weekly Routing Table Report
by Routing Table Analysis 08 Feb '02

08 Feb '02

This is an automated weekly mailing describing the state of the Internet Routing Table as seen from APNIC's router in Japan. Daily listings are sent to bgp-stats(a)lists.apnic.net For a graphical representation, please see http://www.apnic.net/stats/bgp. If you have any comments please contact Philip Smith <pfs(a)cisco.com>. Routing Table Report 20:00 +10GMT Fri 08 Feb, 2002 Analysis Summary ---------------- BGP routing table entries examined: 107908 Prefixes after maximum aggregation: 71978 Unique aggregates announced to Internet: 52602 Total ASes present in the Internet Routing Table: 12515 Origin-only ASes present in the Internet Routing Table: 10824 Origin ASes announcing only one prefix: 4729 Transit ASes present in the Internet Routing Table: 1691 Transit-only ASes present in the Internet Routing Table: 60 Average AS path length visible in the Internet Routing Table: 5.4 Max AS path length visible: 20 Illegal AS announcements present in the Routing Table: 2 Non-routable prefixes present in the Routing Table: 0 Prefixes being announced from the IANA Reserved Address blocks: 15 Number of addresses announced to Internet: 1164266760 Equivalent to 69 /8s, 101 /16s and 77 /24s Percentage of available address space announced: 31.4 Percentage of allocated address space announced: 59.4 Percentage of available address space allocated: 52.8 Total number of prefixes smaller than registry allocations: 71887 APNIC Region Analysis Summary ----------------------------- Prefixes being announced by APNIC Region ASes: 17523 Total APNIC prefixes after maximum aggregation: 10668 Prefixes being announced from the APNIC address blocks: 16019 Unique aggregates announced from the APNIC address blocks: 9821 APNIC Region origin ASes present in the Internet Routing Table: 1450 APNIC Region origin ASes announcing only one prefix: 481 APNIC Region transit ASes present in the Internet Routing Table: 253 Average APNIC Region AS path length visible: 5.3 Max APNIC Region AS path length visible: 15 Number of APNIC addresses announced to Internet: 79436352 Equivalent to 4 /8s, 188 /16s and 26 /24s Percentage of available APNIC address space announced: 58.7 APNIC AS Blocks 4608 - 4864, 7467 - 7722, 9216 - 10239 17408 - 18431, 23552 - 24575 APNIC Address Blocks 61/8, 202/7, 210/7, 218/7 and 220/8 ARIN Region Analysis Summary ---------------------------- Prefixes being announced by ARIN Region ASes: 72415 Total ARIN prefixes after maximum aggregation: 47252 Prefixes being announced from the ARIN address blocks: 51059 Unique aggregates announced from the ARIN address blocks: 17199 ARIN Region origin ASes present in the Internet Routing Table: 7401 ARIN Region origin ASes announcing only one prefix: 2294 ARIN Region transit ASes present in the Internet Routing Table: 762 Average ARIN Region AS path length visible: 5.3 Max ARIN Region AS path length visible: 20 Number of ARIN addresses announced to Internet: 185726788 Equivalent to 11 /8s, 17 /16s and 247 /24s Percentage of available ARIN address space announced: 69.2 ARIN AS Blocks 1 - 1876, 1902 - 2042, 2044 - 2046, 2048 - 2106 2138 - 2584, 2615 - 2772, 2823 - 2829, 2880 - 3153 3354 - 4607, 4865 - 5119, 5632 - 6655, 6912 - 7466 7723 - 8191, 10240 - 12287, 13312 - 15359 16384 - 17407, 18432 - 20479, 21504 - 23551 ARIN Address Blocks 24/8, 63/8, 64/6, 68/8, 199/8, 200/8, 204/6, 208/7 and 216/8 RIPE Region Analysis Summary ---------------------------- Prefixes being announced by RIPE Region ASes: 17970 Total RIPE prefixes after maximum aggregation: 14058 Prefixes being announced from the RIPE address blocks: 14778 Unique aggregates announced from the RIPE address blocks: 9905 RIPE Region origin ASes present in the Internet Routing Table: 3603 RIPE Region origin ASes announcing only one prefix: 1954 RIPE Region transit ASes present in the Internet Routing Table: 657 Average RIPE Region AS path length visible: 5.9 Max RIPE Region AS path length visible: 15 Number of RIPE addresses announced to Internet: 106625024 Equivalent to 6 /8s, 90 /16s and 248 /24s Percentage of available RIPE address space announced: 70.6 RIPE AS Blocks 1877 - 1901, 2043, 2047, 2107 - 2136, 2585 - 2614 2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631 6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383 20480 - 21503, 24576 - 25599 RIPE Address Blocks 62/8, 80/7, 193/8, 194/7, 212/7 and 217/8 APNIC Region per AS prefix count summary ---------------------------------------- ASN No of nets /20 equiv MaxAgg Description 1221 1318 1258 963 Telstra Pty Ltd 4538 454 1162 16 China Education and Research 703 405 363 307 UUNET Technologies, Inc. 2907 395 1893 364 SINET Japan 2764 392 361 369 connect.com.au pty ltd 7474 301 290 204 Optus Communications Pty Ltd 4755 287 111 89 Videsh Sanchar Nigam Ltd. Aut 4134 269 1858 100 Data Communications Bureau 9394 236 112 3 CHINA RAILWAY Internet(CRNET) 4766 206 1393 145 Korea Internet Exchange for " 17557 200 15 90 Pakistan Telecom 7539 162 220 155 TANet2, sponsored by NSC, TAI 9443 161 44 59 Primus Telecommunications 9768 146 385 88 Korea Telecom 9583 139 32 5 Satyam Infoway Ltd., 4197 130 13 5 Global OnLine Japan K.K. 4740 124 17 104 OzEmail ISP 7657 121 22 84 The Internet Group Limited 4713 117 914 103 NTT Communications Corporatio 4780 115 186 40 Digital United Inc. RIPE Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 702 1112 2619 863 UUNET Technologies, Inc. 3301 398 924 351 TeliaNet Sweden 1257 252 487 248 SWIPnet Swedish IP Network 3215 242 570 156 France Telecom / &Equant 680 232 2147 230 DFN-IP service G-WiN 5515 218 705 175 Sonera Finland Autonomous Sys 5400 199 82 96 Concert European Core Network 3320 196 1964 172 Deutsche Telekom AG 786 182 1874 182 The JANET IP Service 719 166 289 120 LANLINK autonomous system 8708 159 21 145 Romania Data Systems S.A. 2856 131 790 120 BTnet UK Regional network 3303 122 576 122 Swisscom Ltd 3269 117 693 71 TELECOM ITALIA 8297 117 40 66 Teleglobe Autonomous System i 12302 114 7 35 MobiFon S.A. 517 100 226 98 KPNQwest Germany GmbH 5603 93 12 59 SiOL Internet d.o.o. 5511 92 192 81 France Telecom 1267 91 1471 41 Infostrada S.p.A. ARIN Region per AS prefix count summary --------------------------------------- ASN No of nets /20 equiv MaxAgg Description 701 2087 8303 1510 UUNET Technologies, Inc. 7018 1233 7510 928 AT&T 1 842 8153 613 BBN Planet 3908 810 1662 470 Supernet, Inc. 1239 795 3216 615 Sprint 4323 635 432 239 Time Warner Communications, I 7046 632 833 417 UUNET Technologies, Inc. 852 616 1141 409 Telus Advanced Communications 209 529 1908 301 Qwest 690 492 72 307 Merit Network 7132 455 508 163 Southwestern Bell Internet Se 2914 453 2195 422 Verio, Inc. 3549 436 821 217 Global Crossing 705 390 116 274 UUNET Technologies, Inc. 2149 390 210 326 Performance Systems, Inc. 3561 369 2237 325 Cable & Wireless USA 577 352 604 219 Bell Advanced Communications 3741 348 731 239 The Internet Solution 2386 329 355 190 AT&T Data Communications Serv 6197 327 227 161 BellSouth Network Solutions, Global Per AS Maximum Aggr summary ---------------------------------- ASN No of nets Net Savings Description 4538 454 438 China Education and Research 4323 635 396 Time Warner Communications, I 1221 1318 355 Telstra Pty Ltd 3908 810 340 Supernet, Inc. 7018 1233 305 AT&T 4151 311 295 USDA 7132 455 292 Southwestern Bell Internet Se 11371 278 271 Rhythms NetConnections 702 1112 249 UUNET Technologies, Inc. 9394 236 233 CHINA RAILWAY Internet(CRNET) 6347 311 232 SAVVIS Communications Corpora 1 842 229 BBN Planet 209 529 228 Qwest 7843 259 221 Adelphia Corp. 3549 436 219 Global Crossing 7046 632 215 UUNET Technologies, Inc. 852 616 207 Telus Advanced Communications 4355 233 204 EarthLink, Inc. 6198 296 202 BellSouth Network Solutions, 1580 211 200 HQ, 5th Signal Command List of Unregistered ASNs (Global) ---------------------------------- Bad AS Designation Network Transit AS Description 1877 UNALLOCATED 192.108.201.0/24 1880 Stupi, house man's p 5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies, Advertised Unregistered Addresses --------------------------------- Network Origin AS Description 39.0.0.0/8 4554 Exchange Point Blocks 96.0.0.0/20 3549 Global Crossing 126.0.0.0/8 7336 Compass Communications 132.0.0.0/10 568 DISO-UNRRA 134.137.0.0/16 7170 AT&T Government Markets 135.0.0.0/13 10455 Lucent Technologies 137.0.0.0/13 568 DISO-UNRRA 138.94.0.0/16 1 BBN Planet 144.7.0.0/16 701 UUNET Technologies, Inc. 153.36.0.0/14 701 UUNET Technologies, Inc. 154.150.0.0/16 6494 IDCI 158.0.0.0/13 568 DISO-UNRRA 164.233.0.0/16 6020 DISA NETWORK SERVICES 164.235.0.0/16 6025 US DOD NIC Unregistered 201.115.100.0/24 7018 AT&T Number of prefixes announced per prefix length (Global) ------------------------------------------------------- /1:0 /2:0 /3:0 /4:0 /5:0 /6:0 /7:0 /8:18 /9:6 /10:7 /11:12 /12:37 /13:91 /14:231 /15:392 /16:7137 /17:1421 /18:2498 /19:7344 /20:6700 /21:4791 /22:7265 /23:8915 /24:60015 /25:219 /26:278 /27:128 /28:100 /29:103 /30:162 /31:0 /32:38 Advertised prefixes smaller than registry allocations ----------------------------------------------------- ASN No of nets Total ann. Description 701 1336 2087 UUNET Technologies, Inc. 1221 1172 1318 Telstra Pty Ltd 702 735 1112 UUNET Technologies, Inc. 7018 646 1233 AT&T 3908 565 810 Supernet, Inc. 4323 517 635 Time Warner Communications, I 690 488 492 Merit Network 1239 471 795 Sprint 7046 460 632 UUNET Technologies, Inc. 1 435 842 BBN Planet 852 375 616 Telus Advanced Communications 209 351 529 Qwest 2764 348 392 connect.com.au pty ltd 705 336 390 UUNET Technologies, Inc. 703 327 405 UUNET Technologies, Inc. 3549 305 436 Global Crossing 2149 297 390 Performance Systems, Inc. 7066 275 304 Virginia Polytechnic Institut 6197 274 327 BellSouth Network Solutions, 11371 272 278 Rhythms NetConnections Number of /24s announced per /8 block (Global) ---------------------------------------------- 4:1 9:1 12:466 13:10 15:1 17:5 20:8 24:664 25:1 32:68 38:9 40:6 44:1 57:14 61:218 62:163 63:1874 64:1099 65:1028 66:668 67:32 68:5 80:179 81:4 128:65 129:119 130:23 131:52 132:11 133:3 134:128 135:10 136:243 137:105 138:148 139:47 140:163 141:61 142:67 143:39 144:154 145:12 146:216 147:148 148:144 149:86 150:40 151:43 152:328 153:32 154:8 155:81 156:77 157:120 158:80 159:88 160:24 161:55 162:101 163:117 164:95 165:126 166:222 167:167 168:114 169:48 170:291 171:3 192:5445 193:2232 194:2031 195:790 196:444 198:3736 199:3261 200:2315 201:1 202:2923 203:4507 204:3281 205:2157 206:2515 207:2628 208:2566 209:2850 210:525 211:146 212:865 213:553 214:9 215:19 216:2938 217:439 218:10 End of report

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The Cidr Report
by CIDR Report 02 Feb '02

02 Feb '02

This is an auto-generated mail on Fri Feb 1 23:00:00 PST 2002 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for the regional version of this report. NEW: Check http://www.employees.org/~tbates/autnums.html for a complete list of autonomous system number to name mappings as used by the CIDR-Report. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to GX Networks for giving me access to their routing tables once a day. Please send any comments about this report directly to CIDR Report <cidr-report(a)cisco.com>. ------------------------------------------------------------------------------ CIDR REPORT for 01Feb02 0) General Status Table History ------------- Date Prefixes 250102 104855 260102 104659 270102 104702 280102 104727 290102 104793 300102 105544 310102 105664 010202 105568 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- AS Summary ---------- Number of ASes in routing system: 12323 Number of ASes announcing only one prefix: 7490 (4238 cidr, 3252 classful) Largest number of cidr routes: 705 announced by AS701 Largest number of classful routes: 1364 announced by AS701 1) Gains by aggregating at the origin AS level --- 01Feb02 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS1221 1171 901 270 23.1% Telstra Pty Ltd AS701 1364 1130 234 17.2% UUNET Technologies, Inc. AS4151 287 156 131 45.6% USDA AS577 318 194 124 39.0% Bell Advanced Communications Inc. AS16473 198 77 121 61.1% Bell South AS7018 818 700 118 14.4% AT&T AS6595 172 61 111 64.5% DoD Education Activity Network As AS17557 196 85 111 56.6% Pakistan Telecom AS705 286 183 103 36.0% UUNET Technologies, Inc. AS7046 327 226 101 30.9% UUNET Technologies, Inc. AS852 384 288 96 25.0% Telus Advanced Communications AS19632 94 9 85 90.4% Metropolis Intercom S.A. AS2048 185 105 80 43.2% State of Louisiana AS12302 112 33 79 70.5% MobiFon S.A. AS1239 469 393 76 16.2% Sprint AS4755 222 151 71 32.0% Videsh Sanchar Nigam Ltd. Autonom AS703 275 213 62 22.5% UUNET Technologies, Inc. AS3464 159 97 62 39.0% Alabama SuperComputer Network AS4200 118 57 61 51.7% Apex Global Information Services, AS7303 107 49 58 54.2% Telecom Argentina Stet-France Tel AS724 210 153 57 27.1% DLA Systems Automation Center AS16758 63 6 57 90.5% IKON Office Solutions AS3908 329 273 56 17.0% Supernet, Inc. AS226 145 89 56 38.6% Los Nettos AS13999 70 14 56 80.0% Mega Cable S.A. de C.V. AS702 654 599 55 8.4% UUNET Technologies, Inc. AS19834 63 8 55 87.3% NetForce, Inc. AS4323 384 330 54 14.1% Time Warner Communications, Inc. AS2149 310 257 53 17.1% Performance Systems, Inc. AS1 487 436 51 10.5% BBN Planet Total 53887 42128 11759 21.8% For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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The Cidr Report
by CIDR Report 26 Jan '02

26 Jan '02

This is an auto-generated mail on Fri Jan 25 23:00:00 PST 2002 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report. NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for the regional version of this report. NEW: Check http://www.employees.org/~tbates/autnums.html for a complete list of autonomous system number to name mappings as used by the CIDR-Report. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to GX Networks for giving me access to their routing tables once a day. Please send any comments about this report directly to CIDR Report <cidr-report(a)cisco.com>. ------------------------------------------------------------------------------ CIDR REPORT for 25Jan02 0) General Status Table History ------------- Date Prefixes 180102 104688 190102 104682 200102 104656 210102 104633 220102 104637 230102 104624 240102 104664 250102 104855 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- AS Summary ---------- Number of ASes in routing system: 12293 Number of ASes announcing only one prefix: 7436 (4212 cidr, 3224 classful) Largest number of cidr routes: 716 announced by AS701 Largest number of classful routes: 1364 announced by AS701 1) Gains by aggregating at the origin AS level --- 25Jan02 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS1221 1172 901 271 23.1% Telstra Pty Ltd AS701 1364 1130 234 17.2% UUNET Technologies, Inc. AS4151 288 156 132 45.8% USDA AS577 320 196 124 38.8% Bell Advanced Communications Inc. AS16473 198 77 121 61.1% Bell South AS7018 815 697 118 14.5% AT&T AS6595 172 61 111 64.5% DoD Education Activity Network As AS705 288 184 104 36.1% UUNET Technologies, Inc. AS852 383 286 97 25.3% Telus Advanced Communications AS17557 184 87 97 52.7% Pakistan Telecom AS7046 313 227 86 27.5% UUNET Technologies, Inc. AS19632 95 13 82 86.3% Metropolis Intercom S.A. AS2048 185 105 80 43.2% State of Louisiana AS12302 111 32 79 71.2% MobiFon S.A. AS1239 469 391 78 16.6% Sprint AS4755 223 151 72 32.3% Videsh Sanchar Nigam Ltd. Autonom AS703 275 213 62 22.5% UUNET Technologies, Inc. AS3464 159 97 62 39.0% Alabama SuperComputer Network AS724 214 155 59 27.6% DLA Systems Automation Center AS226 146 89 57 39.0% Los Nettos AS16758 63 6 57 90.5% IKON Office Solutions AS702 657 601 56 8.5% UUNET Technologies, Inc. AS7303 107 52 55 51.4% Telecom Argentina Stet-France Tel AS4323 383 328 55 14.4% Time Warner Communications, Inc. AS3908 320 265 55 17.2% Supernet, Inc. AS19834 63 8 55 87.3% NetForce, Inc. AS4200 104 50 54 51.9% Apex Global Information Services, AS2149 313 260 53 16.9% Performance Systems, Inc. AS13999 66 14 52 78.8% Mega Cable S.A. de C.V. AS1 492 440 52 10.6% BBN Planet Total 53762 42007 11755 21.9% For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html 2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report 3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report

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