I got a request from one of our customers, regarding documentation of the minimum allocation and assignment sizes of the various IPv4 and IPv6 address blocks. The initial cause of the research was creating filters that reasonably allow IPv6 PI prefices (which are longer than /35 or /32). I found the relevant info for the RIPE NCC's Service Region in http://www.ripe.net/ripe/docs/ripe-510 Now I am wondering - does anyone have a list of URLs or pointers to docs for the other 4 RIRs, which would provide similar information? As an aside, it would be nice to have such information accessible in one place, maybe by way of the NRO's website :-) TIA, Wilfried.