Find Reverse-DNS/PTR using dig, nslookup, host

Reverse-DNS/PTR is used by mail servers. It is used to map an IP address to FQDN or hostname.

To find Reverse DNS record for an IP address, run

nslookup IP_ADDR_HERE

nslookup find PTR record

In this example IP 51.38.246.115 have a Reverse DNS record ok.serverok.in

Using dig

You can also use dig command to find PTR record for an IP address.

dig -x IP_ADDR_HERE
dig +short -x IP_ADDR_HERE

dig ptr record

Using host

host IP_ADDR_HERE

host command to find ptr record

See DNS

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