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| Founded | 1992 (RIPE NCC) 1993 (APNIC) 1997 (ARIN) 1999 (LACNIC) 2003 (NRO) 2004 (AFRINIC) |
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| Type | Internet governance |
| Focus | providing a coordinated Internet number registry system supporting the multi-stakeholder model |
| Origins | 1992 RIPE NCC begins distributing addresses 2003 letter from RIRs to ICANN 2004 Memorandum of Understanding |
Area served | Worldwide |
| Method | coordinating joint activities of regional internet registries |
| Internet |
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 Internet portal |
A regional Internet registry (RIR) is an organization that manages the allocation and registration of Internet number resources within a region of the world. Internet number resources include IP addresses and autonomous system (AS) numbers.
The regional Internet registry system evolved, eventually dividing the responsibility for management to a registry for each of five regions of the world. The regional Internet registries are informally liaised through the unincorporated Number Resource Organization (NRO), which is a coordinating body to act on matters of global importance.[1]
As of 2005, there are currently five regional registries:
- The African Network Information Centre (AFRINIC) is based in Ebene, Mauritius and serves all of Africa.[2]
- The American Registry for Internet Numbers (ARIN) is based in Chantilly, Virginia and serves Antarctica, Canada, the United States, and some Caribbean countries and territories.[3]
- The Asia Pacific Network Information Centre (APNIC) is based in Brisbane, Australia and serves East, South and Southeast Asia and Oceania.[4]
- The Latin America and Caribbean Network Information Centre (LACNIC) is based in Montevideo, Uruguay and serves Latin America as well as some Caribbean countries.[5]
- Réseaux IP Européens Network Coordination Centre (RIPE NCC) is based in Amsterdam, Netherlands and serves Central and West Asia, Europe, and Russia.[6]
- ^ "About the NRO". Number Resource Organization. Archived from the original on 2023-07-06. Retrieved 2023-07-26.
- ^ "African Network Information Centre". Archived from the original on 2011-02-23. Retrieved 2018-12-25.
- ^ "American Registry for Internet Numbers". Archived from the original on 2021-12-22. Retrieved 2018-02-03.
- ^ "Asia-Pacific Network Information Centre". Archived from the original on 2011-02-19. Retrieved 2018-12-25.
- ^ "Latin America and Caribbean Network Information Centre". Archived from the original on 2022-06-08. Retrieved 2018-12-25.
- ^ "RIPE Network Coordination Centre". Archived from the original on 2011-02-23. Retrieved 2018-12-25.