Se ho capito bene:
[code] dig -x 8.8.8.8
; <<>> DiG 9.11.4-P2-RedHat-9.11.4-10.P2.fc28 <<>> -x 8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65401
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;8.8.8.8.in-addr.arpa. IN PTR
;; ANSWER SECTION:
8.8.8.8.in-addr.arpa. 20085 IN PTR google-public-dns-a.google.com.
;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: gio mag 23 06:25:14 CEST 2019
;; MSG SIZE rcvd: 93
[/code]
oppure
nslookup 8.8.8.8
8.8.8.8.in-addr.arpa name = google-public-dns-a.google.com.
Authoritative answers can be found from: