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IP & Network Tools

Reverse DNS Lookup

Query PTR records that map a public IPv4 or IPv6 address back to a hostname.

Free foreverRuns in your browserNo sign-up

IP & Network Tools

Reverse DNS Lookup

Find PTR records that map an IPv4 or IPv6 address back to a hostname.

This live lookup sends only the IP address or hostname you enter to the named public lookup service. Do not submit private hostnames or confidential infrastructure details.

About the Reverse DNS Lookup

Reverse DNS Lookup is a focused network utility for administrators, developers, support teams and people troubleshooting an internet connection. Query PTR records that map a public IPv4 or IPv6 address back to a hostname.

Live results use a public lookup service. Only the address or hostname submitted for lookup is sent to that service.

Results describe public network information and should not be treated as proof of a person's identity or exact physical location.

Key features

  • IPv4 in-addr.arpa conversion
  • IPv6 ip6.arpa conversion
  • PTR answer and TTL display

How to use

  1. 1Enter an IPv4 or IPv6 address.
  2. 2Select Look up.
  3. 3Review any hostname published in its PTR records.

Examples

Reverse DNS Lookup example
Input: 8.8.8.8
Output: dns.google

Many valid IP addresses do not have a PTR record.

Frequently asked questions

Is this tool free?
Yes. It requires no account, payment or software installation.
Are IP location results exact?
No. IP geolocation is approximate and usually identifies a network region, not a home, person or precise device location.
Does this tool expose private network data?
Only the public IP address or hostname you deliberately submit is sent to the public lookup provider shown in the tool.
Can I use it on mobile?
Yes. Inputs, tables and results adapt to phones, tablets and desktop browsers.

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