The WHOIS information of a domain name is a collection of a number of details that are publicly accessed using specific lookup Internet sites or a command line. The protocol that makes this possible carries the same name and you could effortlessly see the firm where a domain address 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 particular domain. This info has to be valid and up-to-date at all times; if not the domain address registration may be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), so you should always make sure that the WHOIS details of your domains are valid. Updating the WHOIS for numerous country-code TLDs is limited, so when you register a completely new domain name, you should double-check the information that you're submitting.