Relevant Links

IPv4 Registration Services

ARIN makes a distinction between address allocation and address assignment. Allocations of IPv4 address space are made to organizations like Internet Service Providers (ISPs) for the purpose of reassigning that space to their customers. Assignments of IPv4 address space are made to end-user organizations for use in running internal networks, and not for sub-delegation of those addresses outside their organization. End-users not currently connected to an ISP and/or who do not plan to be connected to the Internet are encouraged to use private IP numbers reserved for non-connected networks.

The guideline documents below are designed to provide step-by-step instructions on how to complete each process, as well as other important information. The exact policies covering the delegation of IPv4 resources can be found in the ARIN Number Resource Policy Manual (NRPM) .

IPv4 Guidelines

Additional Guidelines

IPv4 Templates

Other Templates

Related RFCs

RFC 2050 Internet Registry IP Allocation Guidelines. K. Hubbard, M. Kosters, D. Conrad, D. Karrenberg, J. Postel. November 1996.

RFC 1517 Applicability Statement for the Implementation of Classless Inter-Domain Routing (CIDR). Internet Engineering Steering Group. R. Hinden. September 1993.

RFC 1518 An Architecture for IP Address Allocation with CIDR. Y. Rekhter & T. Li. September 1993.

RFC 1519 Classless Inter-Domain Routing (CIDR): an Address Assignment and Aggregation Strategy. V. Fuller, T. Li, J. Yu, & K. Varadhan. September 1993. (Obsoletes RFC 1338)

RFC 1520 Exchanging Routing Information Across Provider Boundaries in the CIDR Environment. Y. Rekhter & C. Topolcic. September 1993.