AddInternet Domain Search is a free software application designed for Windows users that facilitates the search for available domain names and provides ownership information through the global Whois database. Its primary features include two main search functions: Domain Search and Whois Search, making it a valuable tool for anyone looking to register a new domain or investigate existing ones.

The Domain Search function allows users to search for domain names across a wide array of extensions, including popular options like .com, .net, and .org, as well as many others. Users can simply input their desired domain name and receive a comprehensive list of available options. Additionally, the Whois Search feature enables users to find detailed information about registered domains, including the owner's name, contact information, and more, by querying the global Whois database.