Intego

Intego NetBarrier contains a useful feature that can help you find out who owns Internet addresses, either domain names or numerical IP addresses. Called “Whois”, this function taps into public databases of domain name registration (DNS) information, and in most cases will show you who owns a given domain name, or which provider owns a specific numerical IP address. While owners can choose to be anonymous, most don’t, so you’ll see the name of the company that owns the name or address, and contacts for them.

To access the Whois function, click the ? icon at the bottom-right of the NetBarrier window, or press Command-Option-4. A window displays. Then, enter a domain name or IP address in the Domain field, and click the Whois button or press the Enter key. The large text field below gives you information about the domain, fetched from publicly accessible information servers. You can save this information to a text file by clicking the Save… button.

You can also use the Whois function to find if a given domain name has been reserved, or that date at which a domain name expires. All in all, you can find out a lot about domains and IP addresses with this easy-to-use function.