The so-called WHOIS details of each registered domain name include information regarding the registrar firm, the registration and expiration dates, as well as the names, phone number, postal address and email address of the owner, the admin and the tech/billing person. WHOIS is a specific protocol that lets you retrieve this info either through a command line or through one of the numerous sites that provide WHOIS lookup services. All information should be up-to-date in line with the regulations of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not legitimate, the internet domain can be reported and the result might be its deletion or losing its ownership. A few country-specific domain extensions have specific limitations concerning the change of their WHOIS information, but in the standard situation any detail can be modified openly and at any moment. Such a modification will show up on lookup websites within 24 hours.