A simple DNS lookup tool
Domain 139.163.251.142
Type PTR
Server Quad9
Duration 51 ms
Results
;; Answer received from 9.9.9.9 (94 bytes)
;;
;; Security Level : UNCHECKED
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 60559
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

OPT pseudo-record : payloadsize 512, xrcode 0, version 0, flags 0
 #<Dnsruby::RR::OPT::Option:0x00007fbd93ad4168>

;; QUESTION SECTION (1  record)
;; 142.251.163.139.in-addr.arpa.	IN	PTR
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