The WHOIS info of a domain is a collection of various details that are publicly accessed through specific lookup Internet sites or a command line. The protocol that makes this possible bears the same name and you can effortlessly see the organization through which a domain has been registered, the creation, expiration and last update dates as well as the names, postal and e-mail address of those listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific Internet domain. All of this information must be valid and up-to-date at all times; if it's not the domain name registration can be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), therefore you must always ensure that the WHOIS details of your domains are valid. Updating the WHOIS for a variety of country-code TLDs is limited, so any time you register a new Internet domain, you ought to double-check the information you're submitting.