Today is a historic milestone for the Internet: the allocation of the last remaining IPv4 Internet addresses from a central pool. The ICANN pool of available unallocated addresses for IPv4 is completely depleted.
The allocation of the final IPv4 addresses is analogous to the last crates of a product leaving a manufacturing warehouse and going to the regional stores or distributions centers, where they can still be distributed to the public. Once they are gone, the supply is exhausted. It’s only a matter of time before the Internet Service Providers (ISPs) must start denying requests for IPv4 address space.
This is not the IPocalypse. The Internet technical community has been planning for IPv4 depletion for some time. IPv6, a new Internet Protocol with a massive amount of address space, is already taking over as IPv4 runs out. For most users, all it means is that your computer’s IP address today might look like 192.0.2.10 (an example IPv4 address), but soon it may resemble 2001:0DB8::/feed:b766 (an example IPv6 address).
The next big event for IPv6 deployment is World IPv6 Day on 8 June, 2011. The goal of this Test Flight Day is to motivate organizations across the industry – Internet service providers, hardware makers, operating system vendors and web companies – to prepare their services for IPv6 to ensure a successful transition as IPv4 addresses run out. Want to find out your IPv6 readiness? Use this test.