Vince writes:

I recently received a request from one of our sites for a block of 256 network numbers from one of our supernet blocks and have been hesitant to fill it because of the relatively large fraction of the current NIC-allocated maximum lock size (1024 networks) it represents. If I recall correctly, at the Boulder Regional Techs meeting, we talked about "reasonable" block sizes in the 32 to 64 network range.

With the input from the regional techs meeting and discussions with the RIPE NCC and the IEPG mailing list, RFC 1366 was revised to recommend a maximum allocation of 64 IP network numbers at a time. There have already been some very good arguements made on this mail string to support allocating smaller blocks while reserving some contiguous blocks for potential growth (smaller than 256). --Elise