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    The Asia Pacific Network Information Centre

    APNIC is a non-profit membership organization responsible for the administration and registration of Internet Protocol (IP) addresses in the Asia-Pacific region, including Japan, Korea, China, and Australia.



    American Registry for Internet Numbers

    ARIN is a non-profit membership organization established for the purpose of the administration and registration of Internet Protocol (IP) addresses in the geographical areas previously managed by Network Solutions, Inc. Those areas include North America, South America, the Caribbean and sub-Saharan Africa.



    Internet Assigned Numbers Authority

    The IANA is the authority originally responsible for the oversight of IP address allocation, the coordination of the assignment of protocol parameters provided for in Internet technical standards, and the management of the DNS, including the delegation of top-level domains and oversight of the root name server system. Under ICANN, the IANA continues to distribute addresses to the Regional Internet Registries, coordinate with the IETF and others to assign protocol parameters, and oversee the operation of the DNS.



    Réseaux IP Européens

    RIPE is an open and voluntary organization which consists of European Internet service providers. The RIPE NCC acts as the Regional Internet Registry (RIR) for Europe and surrounding areas, performs coordination activities for the organizations participating in RIPE, and allocates blocks of IP address space to its Local Internet Registries (LIRs), which then assign the addresses to end-users.