The so-called WHOIS details of every single registered domain name contain details about the registrar organization, the registration and expiration dates, plus the names, telephone number, postal address and e-mail address of the owner, the admin and the tech/billing person. WHOIS is a special protocol that lets you obtain all this information through a command line or using one of the numerous Internet websites which provide WHOIS lookup services. All info should be up-to-date in accordance with the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the info is not correct, the domain name may be reported and the result may be its removal or losing its ownership. Some country-specific domain extensions have certain limitations in connection with the editing of their WHOIS info, but in the general scenario any detail can be modified freely and at any time. Such a modification will show up on lookup sites within a day.