Iljitsch, In deed there were ERX unused space that were divided among RIRs, I think it is referred as "various ERX" (pointed out by Tore). http://bgp.potaroo.net/stats/nro/various.html There were also ERX space transferred from ARIN DB (used to be in InterNIC's) to RIRs because legacy holders were in the RIR region: http://www.lacnic.net/en/erx.html When you talk about "unused" legacy space are you talking about the "various" space or to the legacy space that is currently assigned but the holders just require part of it? Regards, -as On 18 Feb 2011, at 09:36, Tore Anderson wrote:
* Iljitsch van Beijnum
By the way, IANA only deals in /8s. However, a lot of people got legacy /16s or other non-/8 sizes, so some /8s that are marked "legacy" actually contain a lot of unused space. Each of those /8 is "administered" by a RIR, but it's unclear (to me at least) whether that means that RIR gets to give out that space in its region or not.
The unused space in the ERX blocks were divided evenly between the RIRs a couple of years ago, see:
http://www.icann.org/correspondence/wilson-to-conrad-28jan08-en.pdf http://bgp.potaroo.net/stats/nro/various.html
I believe «administered by» simply means that the RIR is the one providing reverse DNS services for the block in question.
Regards, -- Tore Anderson Redpill Linpro AS - http://www.redpill-linpro.com Tel: +47 21 54 41 27