Address Supporting Organization

The ICANN Address Supporting Organization (ASO) was established in 1999 and is one of the three Supporting Organizations (SOs) called for in the ICANN Bylaws. ICANN’s SOs develop topic-specific policy.

The ASO advises the ICANN Board on policy issues relating to the operation, assignment, and management of Internet addresses.

As per the ICANN ASO Memorandum of Understanding (MoU) between ICANN and the five RIRs, the NRO, as the coordinating body for the RIRs, fulfils the role of the ASO.

The ASO also plays a role in ICANN’s Empowered Community, acting as the Decisional Participant, the Decisional Participant Representative and the Empowered Community Administration Representative.


The MoU also states that the ASO shall have an Address Council (ASO AC) consisting of the 15 members of the NRO Number Council (NRO NC).

The NRO NC is an elected body of 15 volunteers. It serves as the ASO AC. Find out more about the ASO AC/NRO EC’s members, duties and responsibilities here.


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Last modified on 22/02/2021