The so-called WHOIS details of each registered domain name include info about the registrar firm, the registration and expiration dates, as well as the names, contact number, postal address and email address of the owner, the administrator and the tech/billing person. WHOIS is a specific protocol that permits you to get all of this information through a command line or by using one of the many websites that provide WHOIS lookup services. All contact details ought to be up-to-date in line with the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the information is not legitimate, the domain can be reported and the result may be its removal or losing its ownership. Some country-specific domain extensions have certain limitations regarding the modification of their WHOIS details, but in the standard case any detail can be modified freely and at any time. Such an adjustment will show up on lookup websites within 24 hours.