The Internet Is Nearly Out of IP Addresses
[..]It's the end of the web as we know it.Every Internet-connected computer, smartphone, car, gadget and gizmo is assigned a four-digit IP address that lets it communicate with the net, thanks to a system known as IPv4 (Internet Protocol version 4). And the flood of new gadgets means we're running out of those addresses.
Web developers have tried to compensate for this problem by creating IPv6 -- a system that recognizes six-digit IP addresses rather than four-digit ones.[..]
But IPv6 isn't backwards-compatible with IPv4, meaning that it's not able to read most content that operates on an IPv4 system. At best, the user experience will be clunky and slow. At worst, instead of a webpage, all users will be able to view is a blank page.
via Fox News