1. protection.outlook.com

1.1. whois

   Domain Name: OUTLOOK.COM
   Registry Domain ID: 2019401_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.markmonitor.com
   Registrar URL: http://www.markmonitor.com
   Updated Date: 2021-07-16T09:32:12Z
   Creation Date: 1994-08-18T04:00:00Z
   Registry Expiry Date: 2022-08-17T04:00:00Z
   Registrar: MarkMonitor Inc.
   Registrar IANA ID: 292
   Registrar Abuse Contact Email: abusecomplaints@markmonitor.com
   Registrar Abuse Contact Phone: +1.2083895740
   Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
   Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
   Domain Status: serverDeleteProhibited https://icann.org/epp#serverDeleteProhibited
   Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited
   Domain Status: serverUpdateProhibited https://icann.org/epp#serverUpdateProhibited
   Name Server: NS1-38.AZURE-DNS.COM
   Name Server: NS2-38.AZURE-DNS.NET
   Name Server: NS3-38.AZURE-DNS.ORG
   Name Server: NS4-38.AZURE-DNS.INFO
   Name Server: NSE12.O365FILTERING.COM
   Name Server: NSE13.O365FILTERING.COM
   Name Server: NSE21.O365FILTERING.COM
   Name Server: NSE24.O365FILTERING.COM
   DNSSEC: unsigned
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2021-09-18T08:54:36Z <<<

1.2. 返答

$ dig protection.outlook.com @ns2-38.azure-dns.net

; <<>> DiG 9.16.1-Ubuntu <<>> protection.outlook.com @ns2-38.azure-dns.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35062
;; flags: qr ad cd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;protection.outlook.com.                IN      A

;; AUTHORITY SECTION:
protection.outlook.com. 7200    IN      NS      ns2-gtm.glbdns.o365filtering.com.
protection.outlook.com. 7200    IN      NS      ns1-gtm.glbdns.o365filtering.com.

;; Query time: 3 msec
;; SERVER: 150.171.16.38#53(150.171.16.38)
;; WHEN: 土  9月 18 17:56:35 JST 2021
;; MSG SIZE  rcvd: 116

$ dig protection.outlook.com @nse13.o365filtering.com

; <<>> DiG 9.16.1-Ubuntu <<>> protection.outlook.com @nse13.o365filtering.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4967
;; flags: qr aa; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;protection.outlook.com.                IN      A

;; AUTHORITY SECTION:
protection.outlook.com. 120     IN      SOA     va3netglb002.messaging.microsoft.com.protection.outlook.com. hostmaster.va3netglb002.messaging.microsoft.com.protection.outlook.com. 2021091402 10800 3600 604800 120

;; Query time: 231 msec
;; SERVER: 104.47.2.8#53(104.47.2.8)
;; WHEN: 土  9月 18 17:57:28 JST 2021
;; MSG SIZE  rcvd: 135

$ dig -t soa protection.outlook.com @nse13.o365filtering.com

; <<>> DiG 9.16.1-Ubuntu <<>> -t soa protection.outlook.com @nse13.o365filtering.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30278
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;protection.outlook.com.                IN      SOA

;; ANSWER SECTION:
protection.outlook.com. 3600    IN      SOA     va3netglb002.messaging.microsoft.com.protection.outlook.com. hostmaster.va3netglb002.messaging.microsoft.com.protection.outlook.com. 2021091402 10800 3600 604800 120

;; AUTHORITY SECTION:
protection.outlook.com. 600     IN      NS      ns2-gtm.glbdns.o365filtering.com.
protection.outlook.com. 600     IN      NS      ns1-gtm.glbdns.o365filtering.com.

1.3. IPアドレスで共用が見える

NSE12.O365FILTERING.COM. 500    IN      A       104.47.38.8
NSE11.O365FILTERING.COM. 500    IN      A       104.47.34.8
NSE13.O365FILTERING.COM. 500    IN      A       104.47.2.8


ns2-gtm.glbdns.o365filtering.com. 30 IN A       104.47.121.8

ns1-gtm.glbdns.o365filtering.com. 517 IN A      104.47.2.8