1. whois

   Domain Name: CLOUDFLARE.NET
   Registry Domain ID: 1542998918_DOMAIN_NET-VRSN
   Registrar WHOIS Server: whois.cloudflare.com
   Registrar URL: http://www.cloudflare.com
   Updated Date: 2015-10-20T06:46:53Z
   Creation Date: 2009-02-17T22:08:05Z
   Registry Expiry Date: 2024-02-17T22:08:05Z
   Registrar: CloudFlare, Inc.

   Name Server: NS1.CLOUDFLARE.NET
   Name Server: NS2.CLOUDFLARE.NET
   Name Server: NS3.CLOUDFLARE.NET
   Name Server: NS4.CLOUDFLARE.NET
   Name Server: NS5.CLOUDFLARE.NET
   DNSSEC: signedDelegation
   DNSSEC DS Data: 2371 13 2 90F710A107DA51ED78125D30A68704CF3C0308AFD01BFCD7057D4BD03B62C68B
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2022-04-29T00:50:19Z <<<

2. history

$ dig -t ns cloudflare.net @a.gtld-servers.net

; <<>> DiG 9.16.1-Ubuntu <<>> -t ns cloudflare.net @a.gtld-servers.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18512
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 11
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; NSID: 6e 6e 6e 31 2d 6e 79 63 37 ("nnn1-nyc7")
;; QUESTION SECTION:
;cloudflare.net.                        IN      NS

;; AUTHORITY SECTION:
cloudflare.net.         172800  IN      NS      ns1.cloudflare.net.
cloudflare.net.         172800  IN      NS      ns2.cloudflare.net.
cloudflare.net.         172800  IN      NS      ns3.cloudflare.net.
cloudflare.net.         172800  IN      NS      ns4.cloudflare.net.
cloudflare.net.         172800  IN      NS      ns5.cloudflare.net.

;; ADDITIONAL SECTION:
ns1.cloudflare.net.     172800  IN      A       173.245.59.31
ns1.cloudflare.net.     172800  IN      AAAA    2400:cb00:2049:1::adf5:3b1f
ns2.cloudflare.net.     172800  IN      A       198.41.222.131
ns2.cloudflare.net.     172800  IN      AAAA    2400:cb00:2049:1::c629:de83
ns3.cloudflare.net.     172800  IN      A       198.41.222.31
ns3.cloudflare.net.     172800  IN      AAAA    2400:cb00:2049:1::c629:de1f
ns4.cloudflare.net.     172800  IN      A       198.41.223.131
ns4.cloudflare.net.     172800  IN      AAAA    2400:cb00:2049:1::c629:df83
ns5.cloudflare.net.     172800  IN      A       198.41.223.31
ns5.cloudflare.net.     172800  IN      AAAA    2400:cb00:2049:1::c629:df1f

;; Query time: 160 msec
;; SERVER: 192.5.6.30#53(192.5.6.30)
;; WHEN: 金  4月 29 09:49:25 JST 2022
;; MSG SIZE  rcvd: 366

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