Hi Lucas, not trying to comment on the address allocation records' changes on ripe's ftp website - just want to note 192/8 contains some "early registrations". Authoritative source of information for these records likely changed in the past. Early Registration Transfer [ERX] Project Transfer of Networks in 192/8 http://www.ripe.net/projects/erx/erx-ip/network-192.html Also different rules apply to IP range registrations if status attribute is set to "EARLY-REGISTRATION" or "ALLOCATED UNSPECIFIED". Early Registration Transfer Project FAQs http://www.ripe.net/info/faq/projects/erx.html#23 http://www.ripe.net/info/faq/projects/erx.html#24 IPv4 Address Allocation and Assignment Policies for the RIPE NCC Service Reg. http://www.ripe.net/ripe/docs/ripe-492.html Martin On Thu, Jul 15, 2010 at 06:09:03PM -0700, Lucas Wang wrote:

I was doing some processing on the address allocation records published on ripe's ftp websites: ftp://ftp.ripe.net/pub/stats/ripencc

And I noticed that for some records the db is bizarre.

For instance, the address block starting from 192.114.0.0 appeared as as ripencc|IL|ipv4|192.114.0.0|327680|20010306|assigned on allocation files before 03/15/2005. Then it disappeared for several years, and popped out on 06/27/2009 as ripencc|EU|ipv4|192.114.0.0|327680|19930901|assigned Note that the country code and allocation date has been changed. It doesn't make sense if the address block was returned because allocation date(19930901) on 06/27/2009 was even before the previous record(20010306).

And on 07/31/2009, it shrunk into a smaller block: ripencc|EU|ipv4|192.114.0.0|21504|19930901|assigned Does this mean part of it was returned?

Any answer regarding how the allocation files are produced or whether the cases mentioned above are errors are greatly appreciated. Thanks in advance,

Lucas

Lucas(Jiangzhe) Wang