The WHOIS information of a domain name is a collection of numerous details that are openly accessed through specific lookup sites or a command line. The protocol which makes this possible carries the same name and you may easily see the organization through which an Internet domain has been registered, the creation, expiration and last update dates together with the names, postal and e-mail address of the people listed as Registrant (owner), Administrative, Technical and Billing contacts for a particular Internet domain. All of this information has to be correct and up-to-date all the time; otherwise the domain registration can be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), so you should always make certain that the WHOIS details of your domain addresses are accurate. Updating the WHOIS for a variety of country-code TLDs is limited, so any time you register a brand new domain address, make sure you double-check the information you're submitting.