The WHOIS info of a domain name is a collection of a variety of details that are openly accessed via special lookup Internet sites or a command line. The protocol which makes this possible bears the same name and you may easily see the company where a domain has been registered, the creation, expiration and last update dates along with the names, postal and email address of the individuals listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific domain. This info has to be legitimate and up-to-date at all times; if not the domain address registration could be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), this means you must always make sure that the WHOIS details of your domains are accurate. Updating the WHOIS for numerous country-code TLDs is limited, so when you register a brand new Internet domain, it is best to double-check the information you're submitting.