watchNS/msidentity.com

$ dig account.msa.msidentity.com @NS1-01.AZURE-DNS.COM

; <<>> DiG 9.16.1-Ubuntu <<>> account.msa.msidentity.com @NS1-01.AZURE-DNS.COM
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19728
;; flags: qr rd cd; QUERY: 1, ANSWER: 0, AUTHORITY: 8, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;account.msa.msidentity.com.    IN      A

;; AUTHORITY SECTION:
msa.msidentity.com.     3600    IN      NS      ns1-06.azure-dns.com.
msa.msidentity.com.     3600    IN      NS      ns2-06.azure-dns.net.
msa.msidentity.com.     3600    IN      NS      ns3-06.azure-dns.org.
msa.msidentity.com.     3600    IN      NS      ns4-06.azure-dns.info.
msa.msidentity.com.     3600    IN      NS      eur2.akam.net.
msa.msidentity.com.     3600    IN      NS      use2.akam.net.
msa.msidentity.com.     3600    IN      NS      usw1.akam.net.
msa.msidentity.com.     3600    IN      NS      ns1-169.akam.net.

;; Query time: 63 msec
;; SERVER: 40.90.4.1#53(40.90.4.1)
;; WHEN: 月  9月 20 09:17:05 JST 2021
;; MSG SIZE  rcvd: 273

akam.net では親と同居。azure-dns は分離。

1. history

msa.msidentity.com.     3600    IN      NS      eur2.akam.net.
msa.msidentity.com.     3600    IN      NS      use2.akam.net.
msa.msidentity.com.     3600    IN      NS      usw1.akam.net.
msa.msidentity.com.     3600    IN      NS      ns1-169.akam.net.

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