Reverse IP Lookup

Find the hostname (PTR record) behind any IPv4 or IPv6 address.

Continue your work

IP WHOIS Lookup — See who owns the IP address block.
IP Location Lookup — Find where the IP address is located.

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Clear instructions

Find steps, examples and limitations below.

Use online

Open the tool in a supported web browser.

Free to use

No sign-up required. Tool-specific limits may apply.

How to use the Reverse IP Lookup

Find the hostname (PTR record) behind any IPv4 or IPv6 address.

1 Enter an IPv4 address such as 8.8.8.8 or an IPv6 address.
2 Click Find hostname to query its PTR record.
3 Check the forward lookup column: “Yes, matches” means the hostname points back to the same IP address.

Example and practical tips

Looking up 8.8.8.8 returns dns.google, which resolves back to 8.8.8.8, so it is forward-confirmed. Mail servers without a matching PTR record are often treated as spam.

Frequently asked questions

Who sets the PTR record?

The owner of the IP address block, usually your hosting or internet provider. Ask them to set it if you run a mail server.

Can this list every website on an IP address?

No. Reverse DNS returns the one name the IP owner chose. Finding all domains on a shared server needs a large web crawl database.