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b; <<>> DiG 9.10.3-P4-Ubuntu <<>> 230.179.226.64
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 7388
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;230.179.226.64. IN A
;; AUTHORITY SECTION:
. 232 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2019102901 1800 900 604800 86400
;; Query time: 117 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Wed Oct 30 10:08:16 CST 2019
;; MSG SIZE rcvd: 118Host 64.226.179.230.in-addr.arpa. not found: 3(NXDOMAIN)Server: 183.60.83.19
Address: 183.60.83.19#53
** server can't find 64.226.179.230.in-addr.arpa: NXDOMAIN