Internet Assigned Numbers Authority

The Internet Assigned Numbers Authority (IANA) is a division of ICANN and for the assignment of numbers and names on the Internet, especially of IP addresses, in charge. She is one of the oldest institutions in the Internet.


The IANA is similar to an accountant certain registrations, without having to purchase. The bookings with IANA have the purpose of coordination.

The IANA shall publish the inventory of public IP addresses of each Regional Internet Registry.

Conversely, coordinates the IANA name resolution, by registering and published root name servers and Network Information Center.

In addition, the IANA many codes contained in specifications of network protocols registered.


Originally, Jonathan Postel, IANA. Steve Crocker described the naming later as " pompous and not serious " ( " lofty and tongue in cheek" ). Postel took over as a student at the University of California at Los Angeles this task and carried them off to the University of Southern California ( USC). Officially, responsibility for the IANA in the DARPA, which had signed a contract with USC to finance and implement the IANA. The research projects of the DARPA and NSF to build and operate the Internet leak, the U.S. government decided under Bill Clinton to appoint a private sector organization with the implementation of the IANA function. To this end, ICANN was founded in 1998. The responsibility for supervision was transferred from DARPA to the NTIA, an agency of the United States Department of Commerce.

The exact tasks and organization of the IANA regulated since 2000 by a treaty between NTIA and ICANN, which is regularly renewed. Recently this has happened on 1 July 2012, when Rod Beckstrom has signed the new agreement in Istanbul. Both parties have agreed therein to a continuation of the IANA to up to seven years, so that the longest maturity of all previous IANA contracts was reached.

IP addresses

The IANA distributed IPv4 addresses in large blocks (typically / 8 in CIDR notation ) to the RIRs, who then according to their own rules for the allocation of addresses to end-users ( in this sense providers or organizations that own their IP addresses Manage ) spread, in which case most / 19er or / 20 blocks are allocated.

The IANA is also responsible for the delegation and assignment of IPv6 addresses, it has here, but so far made ​​easy, as it has distributed just very large blocks to the RIRs and thus made the foreseeable future, other delegations unnecessary. The stock of delegated IPv6 addresses currently exceeds by several times the demand, since IPv6 slowly goes into production.