The so-called WHOIS details of each registered domain name contain information regarding the registrar company, the registration and expiration dates, in addition to the names, phone number, postal address and e-mail address of the owner, the admin and the tech/billing person. WHOIS is a special protocol that permits you to obtain all this information through a command line or by using one of the many sites that provide WHOIS lookup services. All information must 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 accurate, the domain can be reported and the result might be its removal or losing its ownership. A few country-specific internet domain extensions have certain limitations regarding the modification of their WHOIS details, but in the general situation any detail can be modified freely and at any moment. Such a modification will show up on lookup Internet sites within 24 hours.