反応はよくない。
1. whois
$ dig -t ns mappy.com @8.8.8.8
; <<>> DiG 9.18.12-0ubuntu0.22.04.1-Ubuntu <<>> -t ns mappy.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 41915
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
; NSID: 67 70 64 6e 73 2d 6e 72 74 ("gpdns-nrt")
;; QUESTION SECTION:
;mappy.com. IN NS
;; Query time: 3008 msec
;; SERVER: 8.8.8.8#53(8.8.8.8) (UDP)
;; WHEN: Fri May 05 16:51:15 JST 2023
;; MSG SIZE rcvd: 51
2. history
mappy.net. 86400 IN NS ns1.mappy.net. mappy.net. 86400 IN NS ns2.mappy.net. ns1.mappy.net. 3600 IN A 193.203.35.251 ns2.mappy.net. 3600 IN A 193.203.33.251