Tool Web

Reverse DNS Name Generator

Enter an IPv4/IPv6 address and it generates the in-addr.arpa / ip6.arpa name used for reverse lookups (PTR). All conversion happens inside your browser.

Enter an IPv4 or IPv6 address.

How to use

  1. Enter an IPv4 (e.g. 8.8.4.4) or IPv6 (e.g. 2001:db8::1) address.
  2. Click "Convert" to generate the reverse DNS name.
  3. Copy the result with "Copy" and use it.

Frequently asked questions

What is a reverse DNS name used for?

It is the name of the PTR record used to look up a domain from an IP address. It is used to check the name corresponding to an IP in mail server authentication, log analysis, and more.

Is IPv6 supported?

Yes. IPv4 uses in-addr.arpa, and IPv6 uses the ip6.arpa format reversed by nibble.

Are the entered values sent to a server?

No. All conversion happens only inside your browser, and the values are never sent to or stored on any server.