On 6/7/2011 17:16, Scott Howard wrote:
That's because you're asking the wrong nameservers. The response you're getting is pointing you to the correct nameservers (glb1/glb2.facebook.com) which are defintely returning AAAA records for me :
$ dig +short aaaa www.facebook.com @glb1.facebook.com 2620:0:1c08:4000:face:b00c:0:3
Now I'm seeing it. Quite the short TTL: ; <<>> DiG 9.6-ESV-R4 <<>> AAAA www.facebook.com @glb2.facebook.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34595 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;www.facebook.com. IN AAAA ;; ANSWER SECTION: www.facebook.com. 30 IN AAAA 2620:0:1c00:0:face:b00c:0:1 ;; Query time: 34 msec ;; SERVER: 69.171.255.10#53(69.171.255.10) ;; WHEN: Tue Jun 7 17:32:31 2011 ;; MSG SIZE rcvd: 62 Earlier I was getting no AAAA: ; <<>> DiG 9.6-ESV-R4 <<>> AAAA www.facebook.com @glb2.facebook.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32876 ;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;www.facebook.com. IN AAAA ;; AUTHORITY SECTION: www.facebook.com. 500 IN SOA glb01.sf2p.tfbnw.net. hostmaster.facebook.com. 2008102433 10800 3600 604800 86400 ;; Query time: 29 msec ;; SERVER: 69.171.255.10#53(69.171.255.10) ;; WHEN: Tue Jun 7 16:27:29 2011 ;; MSG SIZE rcvd: 101