Posted on Wed Dec 24 00:58:52 +0900 2008 by nabeken 
dig +trace で確認してみたら、自分のドメインの場合、v6 only で引けているようです。いつのまにか org もv6で引けるようになってたとは。。
$ dig +trace ryoko.rimu.tknetworks.org @2001:380:e03:61::1 ; <<>> DiG 9.5.0-P2 <<>> +trace ryoko.rimu.tknetworks.org @2001:380:e03:61::1 ;; global options: printcmd . 3598914 IN NS l.root-servers.net. . 3598914 IN NS a.root-servers.net. . 3598914 IN NS i.root-servers.net. . 3598914 IN NS e.root-servers.net. . 3598914 IN NS k.root-servers.net. . 3598914 IN NS b.root-servers.net. . 3598914 IN NS j.root-servers.net. . 3598914 IN NS d.root-servers.net. . 3598914 IN NS m.root-servers.net. . 3598914 IN NS g.root-servers.net. . 3598914 IN NS h.root-servers.net. . 3598914 IN NS c.root-servers.net. . 3598914 IN NS f.root-servers.net. ;; Received 508 bytes from 2001:380:e03:61::1#53(2001:380:e03:61::1) in 5 ms org. 172800 IN NS B0.ORG.AFILIAS-NST.org. org. 172800 IN NS B2.ORG.AFILIAS-NST.org. org. 172800 IN NS C0.ORG.AFILIAS-NST.INFO. org. 172800 IN NS D0.ORG.AFILIAS-NST.org. org. 172800 IN NS A0.ORG.AFILIAS-NST.INFO. org. 172800 IN NS A2.ORG.AFILIAS-NST.INFO. ;; Received 445 bytes from 2001:503:ba3e::2:30#53(a.root-servers.net) in 256 ms tknetworks.org. 86400 IN NS ns1.tknetworks.org. tknetworks.org. 86400 IN NS ns2.tknetworks.org. ;; Received 111 bytes from 2001:500:e::1#53(A0.ORG.AFILIAS-NST.INFO) in 115 ms ryoko.rimu.tknetworks.org. 86400 IN A 72.249.22.119 ;; Received 59 bytes from 2001:380:e07:2::53#53(ns1.tknetworks.org) in 23 ms
さらに…
$ dig +trace projects.tsuntsun.net @2001:380:e03:61::1 ; <<>> DiG 9.5.0-P2 <<>> +trace projects.tsuntsun.net @2001:380:e03:61::1 ;; global options: printcmd . 3598788 IN NS c.root-servers.net. . 3598788 IN NS j.root-servers.net. . 3598788 IN NS m.root-servers.net. . 3598788 IN NS h.root-servers.net. . 3598788 IN NS b.root-servers.net. . 3598788 IN NS i.root-servers.net. . 3598788 IN NS d.root-servers.net. . 3598788 IN NS l.root-servers.net. . 3598788 IN NS f.root-servers.net. . 3598788 IN NS e.root-servers.net. . 3598788 IN NS a.root-servers.net. . 3598788 IN NS g.root-servers.net. . 3598788 IN NS k.root-servers.net. ;; Received 512 bytes from 2001:380:e03:61::1#53(2001:380:e03:61::1) in 3 ms net. 172800 IN NS K.GTLD-SERVERS.net. net. 172800 IN NS L.GTLD-SERVERS.net. net. 172800 IN NS M.GTLD-SERVERS.net. net. 172800 IN NS A.GTLD-SERVERS.net. net. 172800 IN NS B.GTLD-SERVERS.net. net. 172800 IN NS C.GTLD-SERVERS.net. net. 172800 IN NS D.GTLD-SERVERS.net. net. 172800 IN NS E.GTLD-SERVERS.net. net. 172800 IN NS F.GTLD-SERVERS.net. net. 172800 IN NS G.GTLD-SERVERS.net. net. 172800 IN NS H.GTLD-SERVERS.net. net. 172800 IN NS I.GTLD-SERVERS.net. net. 172800 IN NS J.GTLD-SERVERS.net. ;; Received 508 bytes from 2001:503:c27::2:30#53(j.root-servers.net) in 270 ms tsuntsun.net. 172800 IN NS ns1.tsuntsun.net. tsuntsun.net. 172800 IN NS ns2.tsuntsun.net. ;; Received 107 bytes from 2001:503:231d::2:30#53(B.GTLD-SERVERS.net) in 218 ms projects.tsuntsun.net. 86400 IN A 60.56.118.148 ;; Received 55 bytes from 72.249.22.119#53(ns2.tsuntsun.net) in 170 ms
netももうv6で引けてるんですねえ…。いやはや。