The WHOIS info of a domain name is a collection of various details that are publicly accessed through special lookup websites or a command line. The protocol that makes this possible has the same name and you could very easily see the company 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 the individuals listed as Registrant (owner), Administrative, Technical and Billing contacts for a particular Internet domain. All this information should be correct and up-to-date constantly; otherwise the domain address registration could be challenged. The latter is a policy of ICANN (the Internet Corporation for Assigned Names and Numbers), this means you should always make sure 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 brand new domain, you ought to double-check the information that you are submitting.