城市(city): unknown
省份(region): unknown
国家(country): United States
运营商(isp): unknown
主机名(hostname): unknown
机构(organization): unknown
使用类型(Usage Type): unknown
b; <<>> DiG 9.10.3-P4-Ubuntu <<>> 20.51.175.40
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 4542
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;20.51.175.40. IN A
;; AUTHORITY SECTION:
. 600 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2022021201 1800 900 604800 86400
;; Query time: 63 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Sun Feb 13 02:34:11 CST 2022
;; MSG SIZE rcvd: 105Host 40.175.51.20.in-addr.arpa. not found: 3(NXDOMAIN)Server: 183.60.83.19
Address: 183.60.83.19#53
** server can't find 40.175.51.20.in-addr.arpa: NXDOMAIN