Arin

Arin is the American Registry for Internet Numbers, a nonprofit organization responsible for managing and distributing Internet number resources such as IPv4 and IPv6 addresses and Autonomous System Numbers (ASNs). It serves the region encompassing the United States, Canada, and many Caribbean and North Atlantic islands, acting as one of five Regional Internet Registries worldwide. Internet service providers, enterprises, and other organizations rely on Arin to obtain, register, and maintain accurate records of their Internet number resources. The organization maintains the authoritative WHOIS database for its service region, supporting network operators and researchers who need routing and registration information. Arin also facilitates policy development through community-driven processes, allowing stakeholders to shape how Internet number resources are allocated and managed within its region.