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b; <<>> DiG 9.10.3-P4-Ubuntu <<>> 65.176.35.37
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 63506
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;65.176.35.37. IN A
;; AUTHORITY SECTION:
. 128 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2019103100 1800 900 604800 86400
;; Query time: 50 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Nov 01 00:49:42 CST 2019
;; MSG SIZE rcvd: 116Host 37.35.176.65.in-addr.arpa not found: 2(SERVFAIL);; Got SERVFAIL reply from 183.60.83.19, trying next server
Server: 183.60.82.98
Address: 183.60.82.98#53
** server can't find 37.35.176.65.in-addr.arpa: SERVFAIL