The Internet’s growth reached a major milestone today when its original IP address space, IPv4, assigned the last of its free addresses. That means the Internet’s growth will now depend on the new IP addresses, IPv6.
IPv4 provided for a mere 4 billion (or 4,000,000,000) addresses. The new IPv6 provides for 340 undecillion (or 3,400,000,000,000,000,000,000,000,000,000,000,000,000) addresses. Hopefully that will last us for a while!
The Number Resource Organization NRO announced today that the free pool of available IPv4 addresses is now fully depleted. On Monday, January 31, the Internet Assigned Numbers Authority IANA allocated two blocks of IPv4 address space to APNIC, the Regional Internet Registry RIR for the Asia Pacific region, which triggered a global policy to allocate the remaining IANA pool equally between the five RIRs. Today IANA allocated those blocks. This means that there are no longer any IPv4 addresses available for allocation from the IANA to the five RIRs.
via Free Pool of IPv4 Address Space Depleted | The Number Resource Organization.