Free WHOIS Lookup Tool – Track Down Public Registration Info Now

The WHOIS tool allows you to get a domain name’s public registration information.

Usage

Enter one of the following into the text box:

A domain name
An IPv4 address (eg, 192.168.1.1)
A Base-10 IP address.

If you’re providing a Base-10 IP address, check the Convert Base-10 to IP box.

Click Go!

When to Use It

You can use the WHOIS tool to:

Find out who owns a domain
Get the contact information for the domain owner
See when the registration information was last updated
Find out the status of a domain (eg, active, expired, available)
Find the domain’s DNS servers.

You may not use WHOIS to gather information for the purposes of spamming.

What It Does

The WHOIS tool sends an inquiry to a WHOIS server to get information about the domain. The specific server to which we send your request depends on the top-level domain in your query. If you provide a domain with a .com or .net extension, the query goes to internic.net. If you provide an IP address, the tool will do a reverse DNS lookup to get the associated domain name.

Data Models

Requests for WHOIS information follow the WHOIS protocol that’s specified in RFC 3912. Domain registries can follow a thin or thick data model (the .com and .net TLDs use the thin model). Both models include: