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b; <<>> DiG 9.10.3-P4-Ubuntu <<>> 80.74.94.49
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 44394
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;80.74.94.49. IN A
;; AUTHORITY SECTION:
. 337 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2019111800 1800 900 604800 86400
;; Query time: 174 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Mon Nov 18 17:33:14 CST 2019
;; MSG SIZE rcvd: 115Host 49.94.74.80.in-addr.arpa. not found: 3(NXDOMAIN)Server: 100.100.2.136
Address: 100.100.2.136#53
** server can't find 49.94.74.80.in-addr.arpa: NXDOMAIN