<html><head></head><body dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">I’m not getting consistent AAAA responses from publicdns64.google.com for www.rt.com.<br>It isn’t always mapping to 37.48.108.112 whereas the A record seems to consistently point at that IPv4.<br><br><br>dig @publicdns64.google.com aaaa www.rt.com<br><br>; <<>> DiG 9.8.3-P1 <<>> @publicdns64.google.com aaaa www.rt.com<br>; (2 servers found)<br>;; global options: +cmd<br>;; Got answer:<br>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56562<br>;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0<br><br>;; QUESTION SECTION:<br>;www.rt.com.<span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>AAAA<br><br>;; ANSWER SECTION:<br>www.rt.com.<span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span>9<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>AAAA<span class="Apple-tab-span" style="white-space:pre"> </span>64:ff9b::cff4:50a6<br><br>;; Query time: 84 msec<br>;; SERVER: 2001:4860:4860::6464#53(2001:4860:4860::6464)<br>;; WHEN: Thu Jul 7 06:37:24 2016<br>;; MSG SIZE rcvd: 56<br><br>dig @publicdns64.google.com aaaa www.rt.com<br><br>; <<>> DiG 9.8.3-P1 <<>> @publicdns64.google.com aaaa www.rt.com<br>; (2 servers found)<br>;; global options: +cmd<br>;; Got answer:<br>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26971<br>;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0<br><br>;; QUESTION SECTION:<br>;www.rt.com.<span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>AAAA<br><br>;; ANSWER SECTION:<br>www.rt.com.<span class="Apple-tab-span" style="white-space:pre"> </span><span class="Apple-tab-span" style="white-space:pre"> </span>9<span class="Apple-tab-span" style="white-space:pre"> </span>IN<span class="Apple-tab-span" style="white-space:pre"> </span>AAAA<span class="Apple-tab-span" style="white-space:pre"> </span>64:ff9b::2530:6c70<br><br>;; Query time: 84 msec<br>;; SERVER: 2001:4860:4860::6464#53(2001:4860:4860::6464)<br>;; WHEN: Thu Jul 7 06:41:08 2016<br>;; MSG SIZE dcvd:<br> 56<br><br><br><br><blockquote type="cite">On 7 Jul 2016, at 05:02, Erik Marcus Kline <ek@google.com> wrote:<br><br>https://tools.ietf.org/html/rfc6147#section-5.1.4<br><br>Thought technically it's just a SHOULD, I recall implementing<br>something about this.<br><br><br>On 7 July 2016 at 13:00, Erik Marcus Kline <ek@google.com> wrote:<br><blockquote type="cite">prompt$ dig +short @publicdns64.google.com -t AAAA www.rt.com<br>64:ff9b::cff4:50a6<br><br>On 7 July 2016 at 12:22, Ca By <cb.list6@gmail.com> wrote:<br><blockquote type="cite">Anyone have a contact at www.rt.com that can encourage them to to delete<br>their bad aaaa ?<br><br>This is breaking nat64 users who see a aaaa so no dns64 is being done.<br><br>Shared from ISC Dig for iOS<br><br>; <<>> DiG 9.10.4 <<>> @fe80::4c60:deff:fee6:b019 @192.168.1.1 www.rt.com<br>aaaa +sit +dnssec +noqr +multiline<br>; (1 server found)<br>;; global options: +cmd<br>;; Got answer:<br>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4367<br>;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1<br><br>;; OPT PSEUDOSECTION:<br>; EDNS: version: 0, flags: do; udp: 512<br>;; QUESTION SECTION:<br>;www.rt.com. IN AAAA<br><br>;; ANSWER SECTION:<br>www.rt.com. 10 IN AAAA ::ffff:37.48.108.112<br><br><br>;; Query time: 298 msec<br>;; SERVER: 192.168.1.1#53(192.168.1.1)<br>;; WHEN: Wed Jul 06 20:19:34 PDT 2016<br>;; MSG SIZE rcvd: 67<br><br></blockquote></blockquote></blockquote><br></body></html>