The conventional internet address is about to go the way of the dodo... at least, in the US and Canada. According to estimates, North America will run out of IPv4 addresses (the familiar 18.104.22.168 format) this summer. While some companies might stall this by letting go of IPv4 numbers they don't use, many others will have little choice but to move to IPv6 (hexadecimals) if they want to add new addresses on their networks. The newer standard is already in widespread use, so don't worry about an imminent meltdown. Facebook wouldn't even be functioning unless it had already migrated a lot of servers to IPv6, for instance.