Regional internet registry
A regional Internet registry (RIR) is an organization which is responsible for registering Internet numbers in a special part of the world.
There are 5 active RIRs in the world:
- American Registry for Internet Numbers (ARIN)  for North America
- RIPE Network Coordination Centre (RIPE NCC)  for Europe, the Middle East and Central Asia
- Asia-Pacific Network Information Centre (APNIC)  for Asia and the Pacific region
- Latin American and Caribbean Internet Address Registry (LACNIC)  for Latin America and the Caribbean region
- African Network Information Centre (AfriNIC)  for Africa