The so-called WHOIS details of every registered domain contain information regarding the registrar firm, the registration and expiration dates, as well as the names, contact number, postal address and e-mail address of the owner, the admin 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 numerous sites that offer WHOIS lookup services. All information must be up-to-date as per the rules of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the details are not correct, the internet domain can be reported and the result might be its deletion or losing its ownership. Several country-specific internet domain extensions have certain limitations regarding the editing of their WHOIS information, but in the standard situation any detail can be modified freely and at any time. Such a modification will show up on lookup websites within 1 day.