Guess when IPv4 will run out of addresses? It's closer than you think…

http://www.potaroo.net/tools/ipv4/index.html

It’s time for network admins to finally take a good look at the new standard.  We’re coming up on the day when there just won’t be enough IP addresses to go around.

If you don’t know much about the depletion of IP addresses (v4), or don’t know why we will soon have to change to a new system, read here:

http://www.ripe.net/info/faq/IPv6-deployment.html