Domain
IP to Hostname Lookup
Find the hostname of an IPv4 or IPv6 address with a reverse DNS (PTR) lookup, and check it points back to the same IP.
How to find the hostname of an IP
- Enter an IPv4 or IPv6 address.
- Press Find hostname.
- A hostname only exists if the IP's owner set a PTR record; many home connections don't have a meaningful one.
- Forward-confirmed means the hostname points back to the same IP, which mail servers check.
- Going the other way? Use Hostname to IP.
IP to Hostname: frequently asked questions
How do I find the hostname of an IP address?
Enter the IPv4 or IPv6 address and press Find hostname. The tool performs a reverse DNS lookup and shows the hostname set in the IP's PTR record.
Why does my IP have no hostname?
A hostname only exists if the owner of the IP range has set a PTR record. Many home and mobile connections have none, or a generic one chosen by the internet provider.
What does forward-confirmed mean?
The hostname found for the IP also points back to that same IP. Mail servers check this (FCrDNS); a mail server without it is often treated as spam.
Can I look up a private IP like 192.168.1.1?
No. Private and reserved addresses are only used inside local networks, so they have no public hostname to look up.