A: NXDOMAIN 返答
NS, MX, soa は存在している。
1. whois
Domain Name: 91DIZHI.COM Registry Domain ID: 1953692532_DOMAIN_COM-VRSN Registrar WHOIS Server: whois.godaddy.com Registrar URL: http://www.godaddy.com Updated Date: 2020-08-18T16:00:47Z Creation Date: 2015-08-17T21:08:22Z Registry Expiry Date: 2025-08-17T21:08:22Z Registrar: GoDaddy.com, LLC Registrar IANA ID: 146 Registrar Abuse Contact Email: abuse@godaddy.com Registrar Abuse Contact Phone: 480-624-2505 Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited Name Server: JERRY.NS.CLOUDFLARE.COM Name Server: NELLY.NS.CLOUDFLARE.COM DNSSEC: unsigned URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/ >>> Last update of whois database: 2021-09-22T23:54:13Z <<<
2. history
$ dig -t a 91dizhi.com @sri.ns.cloudflare.com.
; <<>> DiG 9.11.3-1ubuntu1.14-Ubuntu <<>> -t a 91dizhi.com @sri.ns.cloudflare.com.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 42664
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; NSID: 33 38 32 6d 31 33 38 ("382m138")
;; QUESTION SECTION:
;91dizhi.com. IN A
;; AUTHORITY SECTION:
91dizhi.com. 3600 IN SOA jerry.ns.cloudflare.com. dns.cloudflare.com. 2036025496 10000 2400 604800 3600
;; Query time: 19 msec
;; SERVER: 172.64.33.234#53(172.64.33.234)
;; WHEN: Thu Sep 23 08:52:06 JST 2021
;; MSG SIZE rcvd: 111