Facebook is experimenting with IPv6 connectivity to their website. www.v6.facebook.com has IPv6 address 2620:0:1cfe:face:b00c::3 You can reach facebook over IPv6 on the following address:
http://www.v6.facebook.com
apps.v6.facebook.com has IPv6 address 2620:0:1cfe:face:b00c::6
