The American Registry for Internet Numbers (ARIN) is a nonprofit, member-based organization that manages and distributes Internet number resources, including IPv4 and IPv6 addresses, as well as Autonomous System Numbers, in Canada, the United States, and several territories in the Caribbean. ARIN is one of the five Regional Internet Registries (RIRs) worldwide, responsible for ensuring the fair and efficient allocation of these critical resources in the regions it serves. Through its website, https://www.arin.net/, ARIN provides tools and services for resource management, policy development, and community engagement to support the Internet infrastructure and its growth.