Number Resource Society
ARIN: What Is It and What Does It Do?
From address registration to Board oversight and policy development: what ARIN does, how decisions are made and where resource holders can participate, brought up to date by NRS in October 2026.
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First published on 16 April 2025 and updated on 31 July 2026. NRS’s clarifications below tell historical descriptions from current rules: Board size, the policy process and IPv4 exhaustion.
ARIN is the regional Internet register for the United States, Canada, and numerous Caribbean and North Atlantic islands. ARIN manages the distribution of IPv4 and IPv6 address space, as well as AS numbers, the first day of ARIN's operation was December 22, 1997, after becoming a corporation on April 18, 1997.
ARIN, which is a non-profit organization has its headquarters in Chantilly, Virginia, in the United States.
ARIN, which is one of the world's five regional Internet registers provides assistance with the technical management and coordination of Internet number resources. ARIN also facilitates its members' and stakeholders' policy development that takes part in the global Internet community. ARIN is run by an executive board that is chosen by ARIN's members.
NRS clarification. Public policy discussion and membership voting are different participation routes. Voting depends on General Member eligibility and the designated voting contact; joining a discussion does not create a vote.
ARIN offers services such as, management and technical coordination of Internet number resources.
ARIN allocates Internet Protocol resources, creates consensus-based regulations, and promotes the development of the Internet through information and educational outreach while adhering to the stewardship tenets.
Services for registering.
The technical management and inventory management of Internet number resources are the focus of registration services. Services offered are:
- Allocation and assignment of IPv4 addresses
NRS clarification. ARIN’s general IPv4 free pool ran out on 24 September 2015. Today addresses come through the waiting list, transfers and reserved special-purpose pools, each with its own conditions and timeline.
- Allocation and assignment of IPv6 addresses
- Assigning an AS number
- services for directories include:
- Information about a registration transaction (WHOIS)
- Information on routing (Internet routing registry)
Organization services
Interaction between stakeholders, ARIN members, and ARIN; is the focus of organization services. Services offered are:
- Members' meetings and elections
- Publication and distribution of information
- Services for policy formulation in education and training
- Services for policy creation make it easier to create regulations for the technical administration and coordination of Internet number resources.
NRS clarification. The Policy Development Process concerns number-resource policy. Fees and operational service suggestions have separate consultation channels; not every institutional decision is made through the PDP.
ARIN's structure
A professional staff of roughly 50 people, a 7-member board of trustees, a 15-member advisory council, and the Internet community in its region make up ARIN. ARIN members elect the board of trustees and advisory council for three-year periods.
NRS clarification. The staffing and seven-seat Board figures above date from the article’s writing. Under the current bylaws the Board has ten voting members: nine elected Trustees and ARIN’s President. The Advisory Council has up to fifteen elected members plus the President as a non-voting ex officio member. The ordinary elected term is three years.
Board of Trustees
The Board of Trustees (BoT), which has ultimate responsibility for the commercial affairs and financial health of ARIN, is chosen by the ARIN membership. The BoT oversees ARIN's activities in accordance with advice from the Advisory Council and objectives established by the registry's members. To guarantee that all services are given fairly, the BoT is in charge of deciding how to allocate any money collected. The BoT approves recommendations made by the membership and presented.
NRS clarification. The Board’s corporate oversight and policy adoption are distinct from community discussion and Advisory Council recommendations. Fairness is not automatic, and not every policy is decided by a direct membership vote; that is exactly why NRS pushes for accountable registries.
Advisory Council, through Executive decisions are implemented after receiving BoT approval. The Board of Trustees is made up of 7 people, including the president and CEO, the chairman, the treasurer, and others.
NRS clarification. The seven-person figure is out of date. Advice, adoption and implementation are different responsibilities: the bylaws and the Policy Development Process set out who does what, and officer roles add no Board seats.
Advisory Council
In addition to the BoT, ARIN maintains an advisory council that provides guidance to both organizations on issues pertaining to IP address allocation policy. The advisory council submits consensus-based policy recommendations to the BoT for approval while adhering to the processes of the Internet Resource Policy Assessment Process. The advisory council is made up of 15 elected members, including the chair and vice chair.
NRS clarification. The procedure is the Policy Development Process (PDP), not the “Internet Resource Policy Assessment Process”. The Advisory Council develops and recommends number-resource policy through that process; Board adoption remains a separate step.
ARIN's History
In order to "offer IP registration services as an independent, nonprofit business," the organization of ARIN was established in December 1997. Up until now, Network Solutions Corporation carried performed IP address registration as part of the InterNIC project in compliance with the rules established by the IETF (inside the RIPE and APNIC zones).
NRS clarification. ARIN took over InterNIC’s registration functions; it never administered the RIPE NCC or APNIC regions. The official regional history gives the accurate sequence.
In order to "give the users of IP numbers (mostly Internet service providers, corporations, and other large institutions) a voice in the policies by which they are managed and allocated within the North American region," the National Science Foundation approved the plan for the establishment of the not--profit organization ARIN. Network Solutions Corporation transferred these duties, initial personnel, and computer infrastructure to ARIN as part of the transition.
Scott Bradner, John Curran, Kim Hubbard, Don Telage, Randy Bush, Raymundo Vega Aguilar, and Jon Postel (IANA) served as ex-office members of the first board of trustees.
NRS clarification. NRS has not confirmed that every person named here served as an ex officio member. Their names stand as part of ARIN’s founding story; their exact roles are for the official history to settle.
ARIN provided services to Mexico, Central America, South America, and the entire Caribbean up until late 2002. Parts of the Caribbean, Mexico, Central America, and South America are now handled by LACNIC. Moreover, Sub-Saharan Africa was a part of ARIN until AFRINIC was recognized by ICANN as the fifth regional Internet registry in April 2005.
The pool of ARIN IPv4 addresses has been declared exhausted as of September 24, 2015.
NRS clarification. Exhaustion of the general free pool does not invalidate registered addresses or mean that all acquisition routes have closed. Current conditions for waiting lists, transfers and special-purpose reserves differ; IPv6 has separate allocation rules.
References:
ARIN: What Is It and What Does It Do?
How to Get an ARIN IP Address
The link above is the article’s own; you can also open the NRS guide directly.
Participation should lead to influence
- Resource policy: take part in public discussion and follow Advisory Council recommendations through to Board adoption.
- Institutional governance: verify voting membership and contact arrangements before an election. Public policy participation is a separate route.
- Business continuity: examine registration conditions, agreements and dispute procedures on which the network depends. Operators need clear, usable ways to defend their position.
Sources, verified 5 October 2026
The ARIN bylaws define the current institutional structure. The PDP explains policy development, while membership guidance sets out voting conditions. The official history and IPv4 guide provide context for the registry’s origins and free-pool exhaustion. The article’s own references are above.
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