Reverse DNS Lookup
Find the hostname associated with an IP address by querying its PTR (pointer) record. Reverse DNS maps an IP address back to a domain name.
Reverse DNS Lookup
Enter an IP address above to find its hostname.
What is Reverse DNS?
A regular (forward) DNS lookup translates a domain name into an IP address. A reverse DNS lookup does the opposite — it translates an IP address back into a hostname, using a special PTR (pointer) record stored in the in-addr.arpa DNS zone.
Not all IP addresses have a PTR record set. Mail servers commonly configure reverse DNS because many spam filters reject email from IPs without a valid PTR record.