It appears there is a routing loop when trying to reach AT&T Wireless's web site over IPv6 from where I currently sit: Pinging wireless.att.com [2001:1890:1c00:2401::c:0] with 32 bytes of data: Reply from 2001:1890:1c00:2401::c:0: TTL expired in transit. Reply from 2001:1890:1c00:2401::c:0: TTL expired in transit. Reply from 2001:1890:1c00:2401::c:0: TTL expired in transit. Reply from 2001:1890:1c00:2401::c:0: TTL expired in transit. Ping statistics for 2001:1890:1c00:2401::c:0: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Tracing route to wireless.att.com [2001:1890:1c00:2401::c:0] over a maximum of 30 hops: 1 <1 ms <1 ms <1 ms vlan40.s1-lnsskinj.dellservices.net [2607:f2a8:1:5::1] 2 <1 ms <1 ms <1 ms vlan31.colo3.tdc.nwt.dellservices.net [2607:f2a8:1::1] 3 1 ms <1 ms <1 ms ge2-3.core3.tdc.nwt.dellservices.net [2607:f2a8:0:28::1] 4 135 ms 49 ms 7 ms ge1-4.core2.tlx.nyc.dellservices.net [2607:f2a8:0:26::2] 5 5 ms 5 ms 13 ms ge1-13.core1.tlx.nyc.dellservices.net [2607:f2a8:0:6::1] 6 6 ms 6 ms 6 ms vlan111.car3.NewYork1.Level3.net [2001:1900:2100::12ed] 7 7 ms 6 ms 6 ms 2001:1900:19:7::9 8 7 ms 7 ms 7 ms ATT [2001:1900:4:3::202] 9 46 ms 47 ms 47 ms n54ny22crs.ipv6.att.net [2001:1890:ff:ffff:12:122:130:170] 10 46 ms 46 ms 52 ms wswdc22crs.ipv6.att.net [2001:1890:ff:ffff:12:122:3:38] 11 45 ms 47 ms 47 ms attga21crs.ipv6.att.net [2001:1890:ff:ffff:12:122:2:29] 12 50 ms 47 ms 48 ms dlstx22crs.ipv6.att.net [2001:1890:ff:ffff:12:122:28:174] 13 44 ms 44 ms 48 ms dlstx406me3.ipv6.att.net [2001:1890:ff:ffff:12:122:119:17] 14 45 ms 45 ms 45 ms 2001:1890:c00:8500::11eb:dd97 15 * * * Request timed out. 16 45 ms 45 ms 45 ms 2001:1890:1c00:2103::3:1a 17 * * * Request timed out. 18 46 ms 45 ms 45 ms 2001:1890:1c00:2103::3:1a 19 * * * Request timed out. 20 45 ms 45 ms 45 ms 2001:1890:1c00:2103::3:1a 21 * * * Request timed out. 22 45 ms 45 ms 45 ms 2001:1890:1c00:2103::3:1a 23 * * * Request timed out. 24 46 ms 45 ms 45 ms 2001:1890:1c00:2103::3:1a 25 * * * Request timed out. 26 46 ms 45 ms 45 ms 2001:1890:1c00:2103::3:1a 27 * * * Request timed out. 28 46 ms 45 ms 46 ms 2001:1890:1c00:2103::3:1a 29 * * * Request timed out. 30 47 ms 46 ms 46 ms 2001:1890:1c00:2103::3:1a Trace complete.