âŠī¸ Reverse DNS Lookup
Enter an IPv4 or IPv6 address to look up its PTR (reverse DNS) hostname, if one exists.
Input
Results
IP Address
â
Hostname (PTR)
â
How It Works
Reverse DNS looks up the domain name associated with an IP address, using a special zone (in-addr.arpa for IPv4, ip6.arpa for IPv6). Not every IP address has a PTR record â many residential and cloud IPs don't. If none exists, this tool clearly reports "No PTR record found" rather than guessing a hostname.
Examples & Common Use Cases
- 8.8.8.8 â typically resolves to a Google-operated hostname.
- Reverse DNS is commonly checked by mail servers as a spam-filtering signal.