ICANN ( , eye-can) is the Internet Corporation for Assigned Names and Numbers. Headquartered in Marina Del Rey, California, ICANN is a California non-profit corporation that was created on September 18, 1998 in order to oversee a number of Internet-related tasks previously performed directly on behalf of the U.S. Government by other organizations, notably IANA.

The tasks of ICANN include managing the assignment of domain names and IP addresses. To date, much of its work has concerned the introduction of new generic top-level domains. The technical work of ICANN is referred to as the IANA function; the rest of ICANN is mostly concerned with defining policy.

On September 29, 2006, ICANN signed a new agreement with the United States Department of Commerce (DOC) that is a step forward toward the full management of the Internet's system of centrally coordinated identifiers through the multi-stakeholder model of consultation that ICANN represents.

Paul Twomey is the President/CEO of ICANN, since March 27 2003. As of November 3, 2007 Peter Dengate Thrush replaced Vint Cerf as Chairman of the ICANN Board of Directors .