A simple DNS lookup tool
Domain 134.221.1.4
Type PTR
Server Quad9
Duration 3,197 ms
Results
;; Answer received from 9.9.9.9 (83 bytes)
;;
;; Security Level : UNCHECKED
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28972
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

OPT pseudo-record : payloadsize 512, xrcode 0, version 0, flags 0

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

;; ANSWER SECTION (1  record)
4.1.221.134.in-addr.arpa.	28800	IN	PTR	app-dns01.tno.nl.
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