American Registry For Internet Numbers Ltd

Registration services includes coordination and management of ip address space and asn allocations, resource transfers, record maintenance, registration transaction information (whois), routing information (internet routing registry), and reverse dns. Arin allocates internet number resources to internet service providers and end users within its service region.

Ip number management - arin is tasked with the management of ip address space, autonomous system numbers, and in-addr arpa address mapping, as well as database maintenance and verification of reassignment information. Arin also promotes the conservation of internet protocol resources and distributes globally unique internet addresses in a hierarchical manner, permitting the routing scalability of addresses, which is necessary to ensure proper operation of internet routing.