The WhoIs lookup utility is a tool that is designed to look up domain name registration records in the various registrar databases.

To search for a domain, type in the second-level domain you are looking for. “hypertek.net” is an example of a second level domain. Third-level domain names are domains that are preceeded by a "www" or other prefix such as “something.domain.com”. Third-level domains are not contained within the WhoIs database.

Domain Name