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b; <<>> DiG 9.10.3-P4-Ubuntu <<>> 186.250.162.178
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 47019
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;186.250.162.178. IN A
;; AUTHORITY SECTION:
. 282 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2022021301 1800 900 604800 86400
;; Query time: 16 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Mon Feb 14 11:10:51 CST 2022
;; MSG SIZE rcvd: 108Host 178.162.250.186.in-addr.arpa not found: 2(SERVFAIL)
server can't find 186.250.162.178.in-addr.arpa: SERVFAIL