1. whois
2. history
$ dig -t ns hafen.jp @a.dns.jp ; <<>> DiG 9.18.12-0ubuntu0.22.04.3-Ubuntu <<>> -t ns hafen.jp @a.dns.jp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55240 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 3 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1232 ; NSID: 61 32 32 2e 74 79 6f ("a22.tyo") ; COOKIE: ef9e08380478c6fd44965a0865135f1bcfdf53f1d94901a0 (good) ;; QUESTION SECTION: ;hafen.jp. IN NS ;; AUTHORITY SECTION: hafen.jp. 86400 IN NS dns1.shop-pro.jp. hafen.jp. 86400 IN NS dns2.shop-pro.jp. ;; ADDITIONAL SECTION: dns2.shop-pro.jp. 86400 IN A 13.113.96.19 dns1.shop-pro.jp. 86400 IN A 54.150.22.30 ;; Query time: 0 msec ;; SERVER: 203.119.1.1#53(a.dns.jp) (UDP) ;; WHEN: Wed Sep 27 07:45:47 JST 2023 ;; MSG SIZE rcvd: 157