DNS/リゾルバー/dns.jpを調べるについて、ここに記述してください。
$ dig -t ns jp @a.root-servers.net
; <<>> DiG 9.9.5-3ubuntu0.9-Ubuntu <<>> -t ns jp @a.root-servers.net ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11171 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 7, ADDITIONAL: 14 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;jp. IN NS ;; AUTHORITY SECTION: jp. 172800 IN NS a.dns.jp. jp. 172800 IN NS d.dns.jp. jp. 172800 IN NS e.dns.jp. jp. 172800 IN NS f.dns.jp. jp. 172800 IN NS g.dns.jp. jp. 172800 IN NS c.dns.jp. jp. 172800 IN NS b.dns.jp. ;; ADDITIONAL SECTION: a.dns.jp. 172800 IN A 203.119.1.1 a.dns.jp. 172800 IN AAAA 2001:dc4::1 d.dns.jp. 172800 IN A 210.138.175.244 d.dns.jp. 172800 IN AAAA 2001:240::53 e.dns.jp. 172800 IN A 192.50.43.53 e.dns.jp. 172800 IN AAAA 2001:200:c000::35 f.dns.jp. 172800 IN A 150.100.6.8 f.dns.jp. 172800 IN AAAA 2001:2f8:0:100::153 g.dns.jp. 172800 IN A 203.119.40.1 c.dns.jp. 172800 IN A 156.154.100.5 c.dns.jp. 172800 IN AAAA 2001:502:ad09::5 b.dns.jp. 172800 IN A 202.12.30.131 b.dns.jp. 172800 IN AAAA 2001:dc2::1 ;; Query time: 59 msec ;; SERVER: 198.41.0.4#53(198.41.0.4) ;; WHEN: Mon Oct 17 10:10:00 JST 2016 ;; MSG SIZE rcvd: 427
$ dig -t ns jp @203.119.1.1
; <<>> DiG 9.9.5-3ubuntu0.9-Ubuntu <<>> -t ns jp @203.119.1.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3481 ;; flags: qr aa rd; QUERY: 1, ANSWER: 7, AUTHORITY: 0, ADDITIONAL: 1 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;jp. IN NS ;; ANSWER SECTION: jp. 86400 IN NS b.dns.jp. jp. 86400 IN NS e.dns.jp. jp. 86400 IN NS d.dns.jp. jp. 86400 IN NS c.dns.jp. jp. 86400 IN NS a.dns.jp. jp. 86400 IN NS f.dns.jp. jp. 86400 IN NS g.dns.jp. ;; Query time: 5 msec ;; SERVER: 203.119.1.1#53(203.119.1.1) ;; WHEN: Mon Oct 17 10:11:02 JST 2016 ;; MSG SIZE rcvd: 147