On 9 feb 2011, at 21:17, George Herbert wrote: >> Once we're at 128-bit addresses then we can migrate to IPvA (7 - 9 are already taken) without much trouble. > I know about IPv8 (sigh), and the Chinese abortive IPv9 claim, but > when did 7 happen? RFC 1475, apparently: http://www.iana.org/assignments/version-numbers/version-numbers.xhtml