The Internet Corporation for Assigned Names and Numbers (ICANN) is a technical coordination body for the Internet. Created in October 1998 by a broad coalition of the Internet's business, technical, academic, and user communities, ICANN is assuming responsibility for a set of technical functions previously performed under U.S. government contract by IANA and other groups.

Specifically, ICANN coordinates the assignment of the following identifiers that must be globally unique for the Internet to function:

    * Internet domain names
    * IP address numbers
    * protocol parameter and port numbers