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/
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/