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IPv4 Address Space Allocation Policies: Regional Differences
July 28, 2024

IPv4 Address Space Allocation Policies: Regional Differences

The Internet is for all, but how it’s managed? It differs from one place to another. As you know—since you’ve landed on this page, you probably do—the internet runs on unique identifiers called IP addresses. The catch, though, is that they are finite, and we’re running out of them fast. This scarcity has led to the development of regional policies for allocating the remaining IPv4 addresses wisely and strategically.

If you want to explore the differences in IPv4 address space allocation policies across the globe, keep reading.

 

So, Who controls IPv4 Addresses, Exactly?

Well, there are several key organizations that are involved in IPv4 address allocation. Here’s a breakdown of them:

Internet Assigned Numbers Authority (IANA)

This is the big umbrella right here. Imagine a pyramid where IANA sits on top and there are five more organizations below it. IANA is responsible for the global coordination of IP addressing, including the allocation of IPv4 address blocks to Regional Internet Registries (RIRs).

 

Regional Internet Registries (RIRs)

There are five RIRs, each responsible for allocating IP addresses within its respective region. These are:

  1. American Registry for Internet Numbers (ARIN) – North America
  2. Réseaux IP Européens Network Coordination Centre (RIPE NCC) – Europe, the Middle East, and Central Asia
  3. Asia-Pacific Network Information Centre (APNIC) – Asia and the Pacific region
  4. Latin American and Caribbean Network Information Centre (LACNIC) – Latin America and the Caribbean
  5. African Network Information Centre (AFRINIC) – Africa

 

How Does It Work?

IANA allocates the blocks of IPv4 to each RIR based on certain criteria. Each RIR then distributes those addresses further down to the Local Internet Registries (LIRs) and individual users of that region under their own policies.

 

What are the Policy Highlights for Each RIR?

The policies and procedures for IPv4 address allocation have been independently developed by each RIR in consideration of the special needs and characteristics of their region. Here’s a deep dive into each:

 

ARIN (North America)

  • Conservation and Efficiency: ARIN strongly emphasizes the efficient use and conservation of IPv4 address space. Any organization desiring to have some of the IPv4 addresses needs to demonstrate a justified need and efficient utilization of existing allocations.
  • Needs-Based Allocation: Justified requests for additional IPv4 addresses are assessed based on documented need, usually with a detailed address usage plan required for at least the next 12 months.
  • Transfer Policies: ARIN facilitates the transfer of IPv4 addresses between organizations through a clearly specified transfer policy that attempts to find a delicate balance between market-driven transfers and regulatory control to prevent speculation and hoarding.

 

RIPE NCC (Europe, the Middle East, and Central Asia)

  • Liberal Allocation: RIPE NCC has always had an attitude toward IPv4 allocation that is more liberal; generally, it has been less stringent in initial allocations than the other RIRs.

  • Last /8 Policy: In response to the exhaustion of IPv4, RIPE NCC instituted the “Last /8 Policy,” whereby any Local Internet Registry (LIR) could receive one /22 block (1,024 addresses) from whatever remains of the last remaining block of IPv4 addresses.

  • Inter-RIR Transfers: The RIPE NCC supports inter-RIR transfers that facilitate transfer of IPv4 address space between organizations in different RIR regions, while encouraging a more global way of thinking about address management.

 

APNIC (Asia & Pacific)

  • Historical Allocations: In the past, APNIC has made huge initial allocations to satisfy the ever-increasing demand for IPv4 addresses within the Asia-Pacific region.
  • Needs-Based Allocation: Similar to ARIN, APNIC requires proof of justified needs for IPv4 addresses and efficient usage of existing allocations.
  • Transfer Policies: APNIC supports both intra- and inter-RIR transfers, thus facilitating the shifting of IPv4 addresses within the region and beyond to realize enhanced flexibility and market dynamics.

 

LACNIC (Latin America and the Caribbean)

  • Fair distribution: LACNIC works toward the fair distribution of IPv4 addresses, putting much emphasis on ensuring that smaller organizations and less developed areas within the region are provided with all the necessary resources.

  • Community participation: The policies at LACNIC are greatly influenced by the community since there is a very open policy development process that allows for diverse participation from any stakeholder.

  • Transfer Policies: LACNIC does allow transfers of IPv4 addresses within its region but has more stringent policies regarding inter-RIR transfers than some other RIRs—a cautious approach toward address market dynamics.

 

AFRINIC (Africa)

  • Development-Focused Allocation: AFRINIC policies encourage the infrastructural development of the Internet in Africa, with paramount consideration given to allocations that will help the digital sector in Africa grow.

  • Needs-Based Allocation