No article in the knowledge graph for American Registry for Internet Numbers yet.
Who is American Registry for Internet Numbers?
American Registry for Internet Numbers, ARIN, is a nonprofit Internet registry that manages number resources and related registration services for network operators in its service region, placing it in Internet infrastructure and IT services rather than general-purpose software.
- Allocation and registration of IPv4, IPv6, and Autonomous System Numbers
- WHOIS, RDAP, routing registry, and related Internet number directory services
- Resource Public Key Infrastructure, RPKI, for route origin validation and certification
- Policy development and stewardship for Internet number resource administration
- Training, community participation, and operational support for network operators
Show more
More About American Registry for Internet Numbers, ARIN
American Registry for Internet Numbers, ARIN, operates as a regional Internet registry serving network operators, Internet service providers, cloud and hosting providers, enterprises, educational institutions, and public sector organizations across its service area. In enterprise environments, its role centers on the allocation, transfer, registration, and ongoing administration of Internet number resources, specifically IPv4 addresses, IPv6 addresses, and Autonomous System Numbers. These functions support external connectivity, multihoming, routing policy control, and public network identity.
Its services are tied to operational Internet infrastructure rather than application software. Common enterprise touchpoints include IP address management at the registry level, registration data publication through WHOIS and RDAP, delegation records, reverse DNS coordination, and routing security through RPKI. ARIN also operates an Internet Routing Registry service used to publish route objects and related policy data that can be referenced by network operators. These capabilities align with network architecture and governance functions used by carriers, content networks, data center operators, and large organizations that run Internet-connected infrastructure.
From a technology standpoint, ARIN is associated with standards-based Internet coordination mechanisms and operational protocols, including IPv4, IPv6, BGP routing policy administration, RDAP for registration data access, and RPKI for cryptographic validation of route origin information. Compared with commercial IP address management platforms, ARIN does not function as an internal enterprise IPAM system. Its role is the authoritative external registry and registration authority for public number resources within its region.
Its position in Internet services and infrastructure reflects that registry function. The organization sits within the operational layer of the Internet, where address allocation, registry data accuracy, routing trust, and policy administration affect how networks interconnect and how public resources are documented. Its current solution areas center on number resource services, registration data services, routing security, and community-based policy administration, all of which are active parts of today’s Internet operations environment.
Our description of American Registry for Internet Numbers. Updated September 2026.
