The so-called WHOIS details of every single registered domain name include information about the registrar firm, the registration and expiration dates, along with the names, contact number, postal address and email address of the owner, the admin and the tech/billing person. WHOIS is a specific protocol that lets you obtain all this info either through a command line or through one of the numerous sites which provide WHOIS lookup services. All contact details ought to be up-to-date in line with the policies of ICANN, the Internet Corporation for Assigned Names and Numbers. If some of the info is not accurate, the domain might be reported and the result might be its removal or losing its ownership. Some country-specific domain extensions have certain limitations in connection with the change of their WHOIS info, but in the general case any detail can be edited freely and at any time. Such a modification will show up on lookup Internet sites within a day.