On 3 February 2011, the central pool of available IPv4 addresses
managed by the Internet Assigned Numbers Authority (IANA) was depleted
when each Regional Internet Registry (RIR) received its last /8 or
16,777,216 addresses.The five RIRs (AfriNIC, APNIC, ARIN, LACNIC and the
RIPE NCC) will continue to allocate IPv4 address space to their members
in accordance with their community-based regional policies until their
pools of available IPv4 addresses are depleted. It is difficult to
predict when the RIRs will run out of IPv4 addresses.
The deployment of IPv6, a newer protocol that offers many more
addresses, is imperative to the long-term growth, security and stability
of the Internet.
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