By the end of 2015, available IPv4 address space across most of the globe had been exhausted. At the end of 2016, the Internet continues to grow and IPv4 is going strong.
In his annual review of IP addressing, Geoff Huston finds continued growth in the IPv4 network. Mobile Internet operators, content providers and others are relying on IPv4 Network Address Translators as a means of stretching IPv4 to serve as broad a population as possible. The result: One full year after near global IPv4 depletion, IPv4 continues to have a strong hold over the Internet, dominated by a few large incumbent providers, who are focused on cementing their market position at the expense of Internet innovation and diversification. IPv6 made progress in 2016, but all signs continue to point toward a lengthy transition.http://www.potaroo.net/ispcol/2017-01/addr2016.html