Reverse DNS Lookup - WhatIsMyIP.com®
https://www.whatismyip.com/reverse-dns-lookupTo clarify, with a Reverse DNS Lookup, you query the IP address to find the hostname. Therefore, by entering the IP address into the Reverse DNS Lookup Tool, you are able to find the domain name associated with the corresponding IP. DNS Lookup. Server Headers Check. For example, one IP address of Google.com is 74.125.142.147.
Reverse DNS lookup - Wikipedia
https://en.wikipedia.org/wiki/Reverse_DNS_lookupIn computer networks, a reverse DNS lookup or reverse DNS resolution (rDNS) is the querying technique of the Domain Name System (DNS) to determine the domain name associated with an IP address – the reverse of the usual "forward" DNS lookup of an IP address from a domain name. The process of reverse resolving of an IP address uses PTR records. rDNS involves searching domain name registry and registrar tables. This may be used to try to identify the originator’s do…