The WHOIS information of a domain is a collection of a number of details that are freely accessed through special lookup Internet sites or a command line. The protocol which makes this possible has the same name and you can effortlessly see the organization where an Internet domain has been registered, the creation, expiration and last update dates along with the names, postal and e-mail address of the people listed as Registrant (owner), Administrative, Technical and Billing contacts for a specific domain. This information ought to 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), so you must always ensure that the WHOIS details of your domains are accurate. Updating the WHOIS for several country-code TLDs is limited, so any time you register a brand new Internet domain, you should double-check the information that you're submitting.