What is ARIN?

ARIN (American Registry for Internet Numbers) is one of five (5) Regional Internet Registries in the world; the other four (4) RIRs are:



AfriNIC (African Network Information Center)

APNIC (Asia Pacific Network Information Centre)

LACNIC (Latin American and Caribbean IP Address Regional Registry)

RIPE NCC (RIPE Network Coordination Centre)



ARIN's WHOIS service is a great way to find contact and registration information for resources registered with ARIN.