Hello! Don't suppose there's a Yahoo admin in the DNS department that can investigate/debug a Geolocation issue? It appears that Yahoo's Geolocation is putting CenturyLink's IPv6 addresses as being in .BR, causing not only the two CL/Qwest recursive servers (205.171.2.65/205.171.3.65/2001:428::1/2001:428::2), but recusive servers hosted on biz customer IPv6 6RD ranges to return non-US Yahoo servers (and be agonizingly slow). ===== View from local powerdns recursor, dual stacked, but preferring ipv6 for resolving: root@noc:~# dig mg.mail.yahoo.com @127.0.0.2 ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @127.0.0.2 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50638 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;mg.mail.yahoo.com. IN A ;; ANSWER SECTION: mg.mail.yahoo.com. 1349 IN CNAME fd-geoycpi-uno.gycpi.b.yahoodns.net. fd-geoycpi-uno.gycpi.b.yahoodns.net. 300 IN A 200.152.162.161 fd-geoycpi-uno.gycpi.b.yahoodns.net. 300 IN A 200.152.162.135 ;; Query time: 240 msec ;; SERVER: 127.0.0.2#53(127.0.0.2) ;; WHEN: Fri Jan 27 17:20:52 MST 2017 ;; MSG SIZE rcvd: 116 ===== View from CL/Qwest IPv4 (likely dual stacked) and IPv6 recursors: root@noc:~# dig mg.mail.yahoo.com @205.171.2.65 ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @205.171.2.65 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8308 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;mg.mail.yahoo.com. IN A ;; ANSWER SECTION: mg.mail.yahoo.com. 758 IN CNAME fd-geoycpi-uno.gycpi.b.yahoodns.net. fd-geoycpi-uno.gycpi.b.yahoodns.net. 138 IN A 200.152.162.161 fd-geoycpi-uno.gycpi.b.yahoodns.net. 138 IN A 200.152.162.135 ;; Query time: 17 msec ;; SERVER: 205.171.2.65#53(205.171.2.65) ;; WHEN: Fri Jan 27 17:21:35 MST 2017 ;; MSG SIZE rcvd: 127 root@noc:~# dig mg.mail.yahoo.com @2001:428::1 ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @2001:428::1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24138 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;mg.mail.yahoo.com. IN A ;; ANSWER SECTION: mg.mail.yahoo.com. 464 IN CNAME fd-geoycpi-uno.gycpi.b.yahoodns.net. fd-geoycpi-uno.gycpi.b.yahoodns.net. 214 IN A 200.152.162.161 fd-geoycpi-uno.gycpi.b.yahoodns.net. 214 IN A 200.152.162.135 ;; Query time: 46 msec ;; SERVER: 2001:428::1#53(2001:428::1) ;; WHEN: Fri Jan 27 17:23:38 MST 2017 ;; MSG SIZE rcvd: 127 ===== Google recursor for reference: root@noc:~# dig mg.mail.yahoo.com @8.8.8.8 ; <<>> DiG 9.9.5-9+deb8u9-Debian <<>> mg.mail.yahoo.com @8.8.8.8 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13327 ;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 512 ;; QUESTION SECTION: ;mg.mail.yahoo.com. IN A ;; ANSWER SECTION: mg.mail.yahoo.com. 1459 IN CNAME fd-geoycpi-uno.gycpi.b.yahoodns.net. fd-geoycpi-uno.gycpi.b.yahoodns.net. 184 IN A 216.115.100.124 fd-geoycpi-uno.gycpi.b.yahoodns.net. 184 IN A 208.71.44.31 fd-geoycpi-uno.gycpi.b.yahoodns.net. 184 IN A 216.115.100.123 fd-geoycpi-uno.gycpi.b.yahoodns.net. 184 IN A 208.71.44.30 ;; Query time: 27 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Fri Jan 27 17:21:59 MST 2017 ;; MSG SIZE rcvd: 159 For reference, CL/Qwest's IPv6 range for 6RD is 2602::/24. This appears to be impacting Yahoo, Yahoo Mail, Flickr, etc (aka Yahoo owned properties). Thanks! -- Brielle Bruns The Summit Open Source Development Group http://www.sosdg.org / http://www.ahbl.org