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A WHOIS checker is a tool that allows you to lookup and view the public registration information of a domain name. The WHOIS database is a public record that contains important information about domain names, including the name and contact information of the registrant, administrative contact, technical contact, and registrar.
To use a WHOIS checker, simply enter the domain name you want to look up into the tool's input field. The tool will then query the WHOIS database and retrieve the registration information associated with the domain. This information typically includes the name and contact information of the domain owner, as well as the date the domain was registered and its expiration date.
Using a WHOIS checker can be useful for a variety of reasons. For example, it can help you identify the owner of a website or domain name, determine if a domain is available for purchase, or investigate potential copyright or trademark infringement. Additionally, many registrars use WHOIS data to help prevent domain name fraud and abuse.