IANA is responsible for the global coordination of the IP address systems, as well as the ASNs used for routing Internet traffic. IANA allocates IP addresses from the pool of unallocated addresses to the RIRs according to their needs and global policy. IANA also maintains a registry of all IP address blocks and ASNs that have been allocated to each RIR.
- Each RIR makes their own requests for IP addresses and ASNs based on regional needs, and the allocations are made directly from IANA to the RIRs.
- The RIRs then assign IP addresses to their Members, such as Internet Service Providers (ISPs), or to National Internet Registries (NIRs) in the economies where they exist.
- It is important to note there is no US Government authorization required for the allocation of IP addresses and ASNs by IANA.
The IANA functions are managed according to a succinct set of policies, which are developed by the communities with an interest in the specific subset of the IANA functions.
The NTIA has no defined role in relation to the development or adoption of policies relating to the number-related IANA functions.
The RIR communities are responsible for developing global Internet number policy, including management of global pools of IP addresses and Autonomous System Numbers, as described in the ASO Memorandum of Understanding.
The current IANA stewardship process will not substantively alter this arrangement.