Whois Lookup, Whois History, Reverse Whois, DNS & IP Tools

DomainTools makes it simple to find out who the owner of a specific domain name is. We'll tell you who owns a domain, their email address and physical address, their phone number, and a whole lot more!

This ownership search is FREE—just enter the domain name you want to know about and click the Search for Domain button.

And you can enter the domain name you're interested in without being too particular—here are examples illustrating the three different forms we'll accept:

• domaintools.com
• www.domaintools.com
• domain tools

Any of these forms will give you the exact same results.

AND, if all you have is an IP address, you can enter that, too! Searching for an IP address will give you ownership information for that specific IP address.

Finding a good domain name for your business idea, blog, or other online project is hard work—unless you're using the Domain Marketplace. We've combined listings from millions of sources into a single list and built the most powerful tools to help sort through the results.

Give us a few keywords or even a specific domain you're interested in, and we'll find domain names you can register immediately or buy in the domain aftermarket. Click directly to our domain partner, or refine your results with powerful features:

• Proprietary scoring algorithm shows the best domains first
• Effective filters instantly narrow your search results
• Favorites saves interesting domains without losing context

DomainTools can find all the domain names currently or ever owned by anyone, whether they be a person or a company. Just tell us the owner's name, the email address or the physical address, and we'll return a list of the domain names they own or have owned under the information you provided.

The most accurate way to retrieve a full list that includes all names is to follow this process:

• Perform a Domain Ownership Records Search (Whois Search) for a domain name you that you are certain is owned by the person/company in question. (This search is available under the "I Know a Domain Name" tab.)
• Make note of the email address used in the ownership record (Whois record) for that domain.
• Return to the "I Know a Domain Owner" tab and use the email address from the ownership record of the known domain name as the search term in the ownership search,
• - OR -
• Navigate to the Reverse Whois tool and perform the search from that location using the email address from the ownership record of the known domain name as the search term.