APNIC - Asia Pacific Network Information Centre. Internet resource distribution in the Asia/Pacific region
ARIN - American Registry for Internet Numbers. Administration and registration of Internet Protocol (IP) numbers for the Americas.
LACNIC - The Latin American and Caribbean Internet Addresses Registry. An the organization that administrates IP addresses space, Autonomous System Numbers (ASN), reverse resolution and other resources of the Latin American and Caribbean region (LAC), on behalf of the Internet community
RIPE - Reseaux IP Europeens. Performs activities primarily for the benefit of the membership in Europe and the surrounding areas (including the Middle-East and parts of Africa).