ASO & NRO

The Address Supporting Organization (ASO) and the Number Resource Organization (NRO) are two separate bodies. While they are closely linked, they each have distinct responsibilities.

The ASO

The ASO is one of the three Supporting Organizations (SOs) called for in the Internet Corporation for Assigned Names and Numbers (ICANN) Bylaws, and is charged with reviewing and developing recommendations on Internet Protocol (IP) address policy and advises the ICANN Board on policy issues relating to the operation, assignment, and management of IP addresses.

The NRO

The NRO, as the coordinating body for the five RIRs , fulfils the role, responsibilities and functions of the ASO. These functions and responsibilities are outlined in the ICANN-ASO Memorandum of Understanding (MoU).

The NRO provides secretariat support for the ASO, acts as a coordinating mechanism for the five RIRs and participates, as the ASO, in the ICANN Empowered Community.

The NRO NC / ASO AC

The NRO has a Number Council (NRO NC) which serves as the ASO Address Council (ASO AC) within the ICANN structure.

Last modified on 07/07/2020