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b; <<>> DiG 9.10.3-P4-Ubuntu <<>> 13.75.121.113
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 25344
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;13.75.121.113. IN A
;; AUTHORITY SECTION:
. 599 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2022022701 1800 900 604800 86400
;; Query time: 61 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Mon Feb 28 03:50:13 CST 2022
;; MSG SIZE rcvd: 106Host 113.121.75.13.in-addr.arpa. not found: 3(NXDOMAIN)Server: 183.60.83.19
Address: 183.60.83.19#53
** server can't find 113.121.75.13.in-addr.arpa: NXDOMAIN