The so-called WHOIS details of each registered domain include info about the registrar company, the registration and expiration dates, along with the names, phone number, postal address and e-mail address of the owner, the administrator and the tech/billing person. WHOIS is a specific protocol that allows you to obtain all of this information through a command line or using one of the numerous websites that offer WHOIS lookup services. All information should be up-to-date in accordance with the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not correct, the domain name can be reported and the result may be its removal or losing its ownership. Some country-specific domain extensions have certain limitations regarding the change of their WHOIS details, but in the general case any detail can be modified freely and at any moment. Such a modification will appear on lookup websites within 24 hours.