1. watchA
NS query にAを返す。
2. whois
3. history
$ dig -t ns clb88.com @ns1.dns.com ; <<>> DiG 9.11.3-1ubuntu1.11-Ubuntu <<>> -t ns clb88.com @ns1.dns.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62718 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;clb88.com. IN NS ;; ANSWER SECTION: clb88.com. 113 IN A 208.101.48.171 clb88.com. 107 IN A 199.59.148.14 clb88.com. 154 IN A 75.126.2.43 clb88.com. 248 IN A 74.86.228.110 clb88.com. 155 IN A 69.171.248.112 clb88.com. 206 IN A 69.171.248.65 clb88.com. 198 IN A 46.82.174.68 clb88.com. 200 IN A 31.13.82.1 clb88.com. 202 IN A 31.13.74.1 123xo.com. 254 IN A 31.13.74.1 123xo.com. 199 IN A 67.15.100.252 123xo.com. 195 IN A 66.220.146.94 ;; Query time: 63 msec ;; SERVER: 119.167.180.131#53(119.167.180.131) ;; WHEN: Wed Jan 08 00:05:55 JST 2020 ;; MSG SIZE rcvd: 43
4. さすがに
$ dig -t ns qmail.jp @ns1.dns.com ; <<>> DiG 9.11.3-1ubuntu1.11-Ubuntu <<>> -t ns qmail.jp @ns1.dns.com ;; global options: +cmd ;; connection timed out; no servers could be reached