IPv4 'ARPAcolypse' Countdown
IPv4 is still used most everywhere, despite the IANA predicting a shortage of numbers for the last few years.
Some witty gentile made a twitter feed: ARPAgeddon
Approximately 9 days until IPcalypse. 40,494,994 allocatable IPv4s left. #IPv64:01 PM Jan 22nd via IPv4Countdown
All remaining allocatable IPv4s would now fit into a /7 prefix ( ≘ 33,554,432 addresses). #IPv6about 4 hours ago via IPv4Countdown
And here's a flash countdown provided by Hurricane Electric (an IPv6 provider)
February 1st! Mark your calendars!