A Whois listing contains information associated with a domain name, such as its creation and expiration dates, the registrar of record, and various contacts (administrative, technical, etc.).
Whois data is collected when a domain name is registered and is public information. The Whois information appears whenever a person conducts a Whois search on a particular domain name. All information entered in the Whois must be valid.
For information on how to keep your contact information private, see Id protection.