1. DNS/共用ゾーンサービス/さくら/同居の扱い

について、ここに記述してください。

同居、参照でもADDはつかない。

1.1. toyo84.jp

seism.jp とともにさくらに委譲

1.1.1. whois

[Domain Name]                   TOYO84.JP

[Registrant]                    Ito, Takamori

[Name Server]                   minami.toyo84.jp
[Name Server]                   itk.seism.jp
[Name Server]                   ns1.dns.ne.jp
[Name Server]                   ns2.dns.ne.jp
[Signing Key]                   

[Created on]                    2001/05/01
[Expires on]                    2021/05/31
[Status]                        Active
[Last Updated]                  2020/06/01 01:05:09 (JST)

----
[Domain Name]                   SEISM.JP

[Registrant]                    Ito, Takamori

[Name Server]                   minami.toyo84.jp
[Name Server]                   itk.seism.jp
[Name Server]                   ns1.dns.ne.jp
[Name Server]                   ns2.dns.ne.jp
[Signing Key]                   

[Created on]                    2003/03/25
[Expires on]                    2021/03/31
[Status]                        Active
[Last Updated]                  2020/04/17 11:23:26 (JST)

$ dig -t ns toyo84.jp @ns1.dns.ne.jp

; <<>> DiG 9.11.3-1ubuntu1.11-Ubuntu <<>> -t ns toyo84.jp @ns1.dns.ne.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34925
;; flags: qr aa rd; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;toyo84.jp.                     IN      NS

;; ANSWER SECTION:
toyo84.jp.              86400   IN      NS      alb00.seism.jp.
toyo84.jp.              86400   IN      NS      minami.toyo84.jp.
toyo84.jp.              86400   IN      NS      itk.seism.jp.

;; ADDITIONAL SECTION:
minami.toyo84.jp.       86400   IN      A       61.122.81.75

;; Query time: 16 msec
;; SERVER: 61.211.236.1#53(61.211.236.1)
;; WHEN: Sun Jun 21 14:45:45 JST 2020
;; MSG SIZE  rcvd: 119

$ dig -t ns seism.jp @ns1.dns.ne.jp

; <<>> DiG 9.11.3-1ubuntu1.11-Ubuntu <<>> -t ns seism.jp @ns1.dns.ne.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28673
;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 2
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;seism.jp.                      IN      NS

;; ANSWER SECTION:
seism.jp.               86400   IN      NS      itk.seism.jp.
seism.jp.               86400   IN      NS      minami.toyo84.jp.

;; ADDITIONAL SECTION:
itk.seism.jp.           86400   IN      A       153.126.179.143

;; Query time: 18 msec
;; SERVER: 61.211.236.1#53(61.211.236.1)
;; WHEN: Sun Jun 21 14:52:00 JST 2020
;; MSG SIZE  rcvd: 99