The WHOIS database contains the listing of all registered domains on the internet. You can do a WHOIS lookup to access various details related to a domain like registration date, expiry date, domain ID, name of registrar, contact information, server name and more. The WHOIS database is available to the public and anyone can access the details of a registered domain. The database is maintained by the Internet Corporation for Assigned Names and Numbers (ICANN) and updated regularly. If you create a website, you will also have to register yourself with ICANN.