African Region Internet Registry
- Regional Internet Registry that will allocates IP and AS numbers in the African region. Pending ICANN approval.
- http://www.afrinic.net/

Latin American and Caribbean IP address Regional Registry
- Responsible registry for south america.
- http://lacnic.net/

Asia Pacific Network Information Centre
- Regional Internet Registry that allocates IP and AS numbers in the Asia Pacific region. Has a "whois" database that holds information on network contacts for Asia Pacific IP addresses.
- http://www.apnic.net/

Internet Assigned Numbers Authority
- IANA controls numbers for protocols, the Country Code Top Level Domains and maintains the IP Address allotments.
- http://www.iana.org/

American Registry for Internet Numbers
- ARIN is the regional registry of IP and ASN numbers for North America, South America, the Caribbean, and sub-Saharan Africa.
- http://www.arin.net/

RIPE Network Coordination Centre
- Responsible registry for europe, north africa and russian area.
- http://www.ripe.net/