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Free Online Tool

Reverse DNS Lookup

Enter a public IPv4 or IPv6 address to check PTR records and see which hostname, if any, is configured for reverse DNS.

IP address

Enter a public IP address to start.

How to use

Enter a public IPv4 or IPv6 address such as 8.8.8.8.
Click Check Reverse DNS.
Review PTR hostnames and the reverse DNS query name.

FAQ

What is reverse DNS?

Reverse DNS maps an IP address back to a hostname using PTR records.

What is a PTR record?

A PTR record is a DNS record used for reverse DNS lookups. It can show the hostname associated with an IP address.

Why does my IP have no PTR record?

Many IP addresses do not have reverse DNS configured. This is common for some hosting, VPN, residential, and temporary IP addresses.

Why are private IPs blocked?

Private, local, and reserved IP addresses are blocked because this public tool is intended for public internet IP checks.

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