The WHOIS information of a domain name is a collection of various details that are publicly accessed via special lookup Internet sites or a command line. The protocol which makes this possible carries the same name and you may easily see the company through which an Internet domain has been registered, the creation, expiration and last update dates as well as the names, postal and email address of the individuals listed as Registrant (owner), Administrative, Technical and Billing contacts for a particular domain name. This info should be valid and up-to-date at all times; if it's 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 should always make certain that the WHOIS details of your domain names are accurate. Updating the WHOIS for numerous country-code TLDs is limited, so when you register a completely new domain address, it is best to double-check the information you are submitting.