TLD/com/kresd-coldについて、ここに記述してください。
$ dig -t ns com @127.0.0.3
; <<>> DiG 9.9.5-3ubuntu0.6-Ubuntu <<>> -t ns com @127.0.0.3 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51974 ;; flags: qr rd ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;com. IN NS ;; ANSWER SECTION: com. 172762 IN NS a.gtld-servers.net. com. 172762 IN NS b.gtld-servers.net. com. 172762 IN NS c.gtld-servers.net. com. 172762 IN NS d.gtld-servers.net. com. 172762 IN NS e.gtld-servers.net. com. 172762 IN NS f.gtld-servers.net. com. 172762 IN NS g.gtld-servers.net. com. 172762 IN NS h.gtld-servers.net. com. 172762 IN NS i.gtld-servers.net. com. 172762 IN NS j.gtld-servers.net. com. 172762 IN NS k.gtld-servers.net. com. 172762 IN NS l.gtld-servers.net. com. 172762 IN NS m.gtld-servers.net. ;; Query time: 0 msec ;; SERVER: 127.0.0.3#53(127.0.0.3) ;; WHEN: Tue Jan 19 09:19:35 JST 2016 ;; MSG SIZE rcvd: 256
tmaeno@tm:~$ dig a.gtld-servers.net @127.0.0.3
; <<>> DiG 9.9.5-3ubuntu0.6-Ubuntu <<>> a.gtld-servers.net @127.0.0.3 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5615 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;a.gtld-servers.net. IN A ;; ANSWER SECTION: a.gtld-servers.net. 172740 IN A 192.5.6.30 ;; Query time: 1 msec ;; SERVER: 127.0.0.3#53(127.0.0.3) ;; WHEN: Tue Jan 19 09:19:57 JST 2016 ;; MSG SIZE rcvd: 63
tmaeno@tm:~$ dig -t ns gtld-servers.net @127.0.0.3
; <<>> DiG 9.9.5-3ubuntu0.6-Ubuntu <<>> -t ns gtld-servers.net @127.0.0.3 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41311 ;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;gtld-servers.net. IN NS ;; ANSWER SECTION: gtld-servers.net. 86400 IN NS av2.nstld.com. gtld-servers.net. 86400 IN NS av3.nstld.com. gtld-servers.net. 86400 IN NS av1.nstld.com. gtld-servers.net. 86400 IN NS av4.nstld.com. ;; Query time: 98 msec ;; SERVER: 127.0.0.3#53(127.0.0.3) ;; WHEN: Tue Jan 19 09:20:24 JST 2016 ;; MSG SIZE rcvd: 153
tmaeno@tm:~$ dig av1.gtld-servers.net @127.0.0.3
; <<>> DiG 9.9.5-3ubuntu0.6-Ubuntu <<>> av1.gtld-servers.net @127.0.0.3 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 8924 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;av1.gtld-servers.net. IN A ;; AUTHORITY SECTION: gtld-servers.net. 86400 IN SOA av4.nstld.com. nstld.verisign-grs.com. 2016010700 3600 900 1209600 86400 ;; Query time: 8 msec ;; SERVER: 127.0.0.3#53(127.0.0.3) ;; WHEN: Tue Jan 19 09:21:18 JST 2016 ;; MSG SIZE rcvd: 117
tmaeno@tm:~$ dig av1.nstld.com @127.0.0.3
; <<>> DiG 9.9.5-3ubuntu0.6-Ubuntu <<>> av1.nstld.com @127.0.0.3 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40563 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;av1.nstld.com. IN A ;; ANSWER SECTION: av1.nstld.com. 172712 IN A 192.42.177.30 ;; Query time: 0 msec ;; SERVER: 127.0.0.3#53(127.0.0.3) ;; WHEN: Tue Jan 19 09:21:51 JST 2016 ;; MSG SIZE rcvd: 58