Domain Name Whois - The Internet Corporation for Assigned Names and Numbers (ICANN) is the non-profit corporation that was formed to assume responsibility for the IP address space allocation, protocol parameter assignment, domain name system management, and root server system management functions previously performed under U.S. Government contract by IANA and other entities.

Normally only the Admin or Tech contact can change the domain record online. Be careful, otherwise your web site is down if your changes are wrong !