🔍 PTR Record Lookup · DNS-over-HTTPS
Reverse DNS Lookup
Enter an IP address to find its associated hostname (PTR record). Useful for verifying mail servers, investigating IP addresses, and network diagnostics.
Enter any IPv4 or IPv6 address.
What is Reverse DNS?
A reverse DNS lookup queries the PTR record for an IP address to find its associated hostname. Unlike a forward DNS query (domain → IP), reverse DNS maps an IP address back to a domain name.
PTR records are stored under the special
PTR records are stored under the special
in-addr.arpa domain for IPv4 and ip6.arpa for IPv6. Common uses include email server verification, network diagnostics, and security investigations.