The WHOIS information of a domain name is a collection of many details which are publicly accessed using special lookup sites or a command line. The protocol that makes this possible bears the same name and you may effortlessly see the organization where a domain has been registered, the creation, expiration and last update dates in addition to the names, postal and e-mail address of the people listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific domain address. All this info must be correct and up-to-date constantly; otherwise the domain address registration may 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 domain names are accurate. Updating the WHOIS for a number of country-code TLDs is limited, so when you register a new domain, it is best to double-check the information you are submitting.