1. watchA
ns1 が NSを返していたことがある。
セカンダリサーバーとして動作 zone 転送を含む
2. whois
[Domain Name] STELLALINK.JP [Registrant] Stellalink, Inc. [Name Server] sphere.eternal-snow.com [Name Server] ns1.dns.ne.jp [Name Server] ns2.dns.ne.jp [Name Server] 2nd.dnsv.jp [Signing Key] [Created on] 2011/12/21 [Expires on] 2022/12/31 [Status] Active [Last Updated] 2022/01/01 01:05:08 (JST)
3. history
$ dig -t soa stellalink.jp @2nd.dnsv.jp ; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> -t soa stellalink.jp @2nd.dnsv.jp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29953 ;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 1 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ; NSID: 64 63 61 ("dca") ;; QUESTION SECTION: ;stellalink.jp. IN SOA ;; ANSWER SECTION: stellalink.jp. 3600 IN SOA sphere.eternal-snow.com. hostmaster.eternal-snow.com. 2014052650 10800 3600 3600 3600 ;; AUTHORITY SECTION: stellalink.jp. 3600 IN NS 2nd.dnsv.jp. stellalink.jp. 3600 IN NS ns1.dns.ne.jp. stellalink.jp. 3600 IN NS ns2.dns.ne.jp. stellalink.jp. 3600 IN NS sphere.eternal-snow.com. ;; Query time: 16 msec ;; SERVER: 163.44.76.142#53(163.44.76.142) ;; WHEN: Tue Feb 15 20:29:18 JST 2022 ;; MSG SIZE rcvd: 199