The five Regional Internet Registries (RIRs) – AFRINIC, APNIC, ARIN, LACNIC and RIPE NCC, have drafted a joint response to the ITU Council Working Group consultation on international public policy issues concerning the current global situation regarding IPv4 address space.
The document answers issue 2 of the consultation regarding:
(a) Unused legacy IPv4 addresses, and
(b) Inter-regional transfers of IPv4 addresses
The response notes that we are now in the final phases of IPv4 address allocation. While there may be avenues to still obtain IPv4 address space, for example, through redistributed legacy address space via IANA or through transfer mechanisms in place by individual RIR communities both within and between regions where transfer policies exist, the adoption of IPv6 is the only option for the future growth and interoperability of the Internet. In particular, the RIRs note that the most successful IPv6 adoption initiatives seen to date have been multistakeholder in nature, harnessing the strengths of various sectors to encourage deployment of IPv6 or to build the capacity necessary to do so.
You can read the full document here.
More information on ITU CWG consultation on international public policy issues is available.