On Wednesday, April 27, 2016, Aaron Hopkins <lists@die.net> wrote:
On Wed, 27 Apr 2016, Baptiste Jonglez wrote:
While doing statistics on the participants of a public DHT, I was
surprised to see some IP addresses that are not present in the DFZ:
I believe those are used by T-mobile's 464XLAT (RFC 6877) implementation.
Recent Android on T-mobile is IPv6-only and has no ability to connect to raw IPv4 addresses. T-mobile's DNS servers are only asked by these devices to translate hostnames to IPv6 addresses. If they can't find an IPv6 address, they will look up the IPv4 address for a hostname, and pack it into the bottom 32 bits of an IPv6 address that routes to a IPv6-to-IPv4 NAT device.
2607:7700:0:25::4e00:605b
4e00:605b -> 78.0.96.91
-- Aaron
Apple has also required the ability for ipv6-only operations https://developer.apple.com/news/?id=08282015a