DNS

Reverse DNS Checker

Check whether an IP address has a valid PTR (Reverse DNS) record.

Reverse DNS Lookup

Examples:

How to use

  1. Enter an IPv4 or IPv6 address.
  2. Click Check Reverse DNS.
  3. Review the PTR hostname.

Frequently Asked Questions

What is Reverse DNS?

Reverse DNS maps an IP address back to its hostname.

Why is PTR important?

Many receiving mail servers verify PTR records to improve email trust.

Does it support IPv6?

Yes.

Related Tools

SPF Checker → MX Lookup →