The WHOIS information of an domain is a collection of a number of details which are openly accessed using special lookup Internet sites or a command line. The protocol which makes this possible bears the same name and you may easily see the organization through which a domain address has been registered, the creation, expiration and last update dates in addition to the names, postal and email address of the people listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific Internet domain. This info has to be valid and up-to-date constantly; otherwise 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 make certain that the WHOIS details of your domain names are valid. Updating the WHOIS for numerous country-code TLDs is limited, so any time you register a brand new domain address, you ought to double-check the information that you are submitting.