My regular BT and CTL link contacts have not responded, but perhaps there's another engineer on the list that can investigate. www.bt.com hasn't had an AAAA since Friday, October 30 at 4:36 am (U.S. Central). OpenDNS carried it for a while longer yesterday, but when I checked this morning it was gone. www.centurylink.com (and www.qwest.com) have had HTTPv6 access down since Friday, October 30 at 1:21 am (U.S. Central). I suspect that after maintenance something wasn't fixed up or restored. In addition, the following sites, which had working HTTPv6 at one time, remain down: enterprise.ca cs.co mydeviceinfo.comcast.net www.dnssec.comcast.net wireless.att.com www.att.net (Akamai hosted) www.charter.com www.twtelecom.com Regards, Frank root@nagios:/home/fbulk# wget -6 www.centurylink.com --2015-10-31 09:53:13-- http://www.centurylink.com/ Resolving www.centurylink.com... 2001:428:b21:1::20 Connecting to www.centurylink.com|2001:428:b21:1::20|:80... failed: Connection timed out. Retrying. --2015-10-31 09:53:35-- (try: 2) http://www.centurylink.com/ Connecting to www.centurylink.com|2001:428:b21:1::20|:80... failed: Connection timed out. Retrying. --2015-10-31 09:53:58-- (try: 3) http://www.centurylink.com/ Connecting to www.centurylink.com|2001:428:b21:1::20|:80... failed: Connection timed out. Retrying. --2015-10-31 09:54:22-- (try: 4) http://www.centurylink.com/ Connecting to www.centurylink.com|2001:428:b21:1::20|:80... failed: Connection timed out. Retrying. --2015-10-31 09:54:47-- (try: 5) http://www.centurylink.com/ Connecting to www.centurylink.com|2001:428:b21:1::20|:80... failed: Connection timed out. Retrying. --2015-10-31 09:55:13-- (try: 6) http://www.centurylink.com/ Connecting to www.centurylink.com|2001:428:b21:1::20|:80... ^C root@nagios:/home/fbulk#