ARIN's Role

ARIN (American Registry for Internet Numbers) is a Regional Internet Registry (RIR) that manages the distribution of Internet number resources in North America, including the United States, Canada, and parts of the Caribbean.

• • Allocates IPv4 and IPv6 address space
• • Assigns Autonomous System Numbers (ASNs)
• • Maintains registration database (Whois)
• • Provides policy development forum

Coverage Area

ARIN serves the United States, Canada, and many Caribbean and North Atlantic islands. Other regions are served by different RIRs like RIPE NCC (Europe), APNIC (Asia-Pacific), LACNIC (Latin America), and AFRINIC (Africa).