APNIC Policy 015: What IPv4 Holders Must Know Now

Version 015 of the APNIC policy document, effective 20 February 2025, dictates the strict governance of Internet number resources across the region. This update supersedes version 014 and implements specific community proposals to refine how IPv4, IPv6, and ASN assets are managed. The Asia Pacific Network Information Centre (APNIC) enforces these rules to ensure uniqueness and conservation within the regional registry system.

This analysis dissects the mandate of APNIC as the Regional Internet Registry responsible for distributing public address space. We examine the mechanical frameworks governing IPv4 depletion and IPv6 allocation, highlighting the sharp divergence from legacy distribution models. We also analyze the rigorous procedures required for executing IPv4 transfers and managing Autonomous System Numbers under the new guidelines.

Compliance with APNIC-127 is mandatory for National Internet Registries and Local Internet Registries operating in this jurisdiction. The updated text clarifies the hierarchy of resource distribution while addressing the complexities of historical resources and address stockpiling. Understanding these protocols is necessary for any entity seeking to maintain valid registrations or acquire new blocks in a constrained market.

The Role of APNIC in Governing Internet Number Resources

Defining APNIC's Governance of IPv4, IPv6, and ASNs

The Asia Pacific Network Information Centre functions as the Regional Internet Registry governing public IPv4, IPv6, and ASN distribution across the Asia Pacific. These policies were developed by the Internet community of the Asia Pacific region through a consensus process facilitated by APNIC to manage scarcity and prevent stockpiling. The framework explicitly distinguishes between current resources registered under the agreements and historical resources derived from early registry policies or the AUNIC migration. Unlike national bodies with narrower mandates, APNIC maintains a unified policy environment covering all three number resource types simultaneously.

Historical resources lack the explicit contractual obligations found in modern delegations, creating distinct compliance requirements during transfers. This distinction forces network planners to verify registration status before initiating market transactions, as transferred IPv4 addresses that are not announced in the global routing table are subject to revocation. Network planners should audit legacy holdings against current utilization metrics to ensure eligibility for future expansions or market transfers.

Applying the HD-Ratio to Multihomed Network Assignments

Efficiency in assignment is not optional; it is mathematical. The HD-Ratio quantifies assignment efficiency by dividing the logarithm of allocated objects by the logarithm of maximum allocatable objects. This metric prevents premature exhaustion of IPv4 blocks within the hierarchical distribution model. Operators managing a multihomed network, set as connecting an autonomous system to the public Internet through more than one AS, must demonstrate this connectivity to validate the necessity for distinct routing policies. Demonstrating such connectivity represents a tangible infrastructure investment that validates the necessity for distinct routing policies.

Policy evaluations rely on demonstrated need and utilization documentation to approve subsequent delegations. The mathematical formulation ensures that large address blocks remain available for genuine expansion rather than speculative holding. This tension forces operators to balance immediate redundancy requirements against long-term conservation goals mandated by the consensus process.

Organizations unable to demonstrate need may face rejection of their resource applications. The Internet Number Resource Policies treat addresses as shared assets requiring proven technical need. Clients should audit their current delegation efficiency before submitting new assignment requests. Failure to optimize existing space usage directly impacts eligibility for future allocations under the active framework.

Validating Resource License Terms Against APNIC-127 Version 015

Compliance verification begins by confirming the active APNIC-127 version is 015, dated 20 February 2025. This version supersedes APNIC-127-v014 and implements proposals prop-154 and prop-156. Operators must align their resource license documentation with these specific updates to maintain valid delegated address space. The framework mandates that Local Internet Registries strictly adhere to set hierarchies when assigning resources to downstream ISPs. Failure to maintain accurate registration details can result in administrative actions regarding resource holdings.

The primary tension exists between maintaining historical registration inertia and satisfying current consensus policies. While legacy holdings often lack modern contractual metadata, the policy environment requires that all assignments be registered in a publicly accessible database. Networks should audit their assigned address space against the latest community guidelines immediately. Neglecting this synchronization creates a latent failure mode where valid technical usage conflicts with outdated administrative status. Regular reviews prevent such discrepancies from escalating into service disruptions.

Mechanics of IPv4 and IPv6 Allocation Frameworks

IPv4 Exhaustion Rules Versus IPv6 Sparse Allocation Models

IPv4 policy enforces strict minimum and maximum delegations to mitigate exhaustion, whereas IPv6 uses a sparse allocation model driven by algorithmic subdivision. The fundamental divergence lies in conservation versus abundance logic. IPv4 rules mandate that prior delegations be fully utilized before requesting additional space, creating a hard ceiling on inventory accumulation for LIRs. In contrast, IPv6 distribution follows a specific algorithm that works from the beginning of the free pool to the end, successively sub-dividing blocks to leave preceding addresses available for future efficiency.

This structural difference creates a specific operational tension: IPv4 holders face immediate barriers to growth without market purchases, while IPv6 holders must justify topology rather than volume. The method ensures that address space remains contiguous within specific binary boundaries, reducing global routing table fragmentation. Networks are advised to optimize existing IPv4 footprints through strict internal auditing while using the abundant but structured IPv6 pool for new infrastructure deployment. The cost of ignoring this divergence is inefficient capital expenditure on leased IPv4 space that could be offset by aggressive IPv6 migration.

Executing Subsequent Allocations Using HD-Ratio and Utilization Checks

Requesting additional IPv6 space requires proving that prior delegations reached maximum efficient utilization before new blocks are issued. The process validates need through the HD-Ratio, a mathematical metric found in Appendix A that quantifies assignment density against the total available address space. Network operators must calculate this ratio to demonstrate that their current inventory cannot accommodate further growth without violating aggregation principles. Unlike IPv4 policies where stockpiling is strictly barred, the sparse allocation model for IPv6 relies on an algorithm that works from the beginning of the free pool to the end, successively sub-dividing blocks to optimize continuity.

Organizations requesting resources must demonstrate "need" through rigorous documentation submitted during the application review. This evidence ensures that the allocation framework remains responsive to actual deployment rates rather than speculative demand. The HD-Ratio calculation prevents fragmentation by enforcing a threshold where the logarithm of assigned addresses approaches the logarithm of the total allocated block.

A critical tension exists between rapid expansion and the conservation goals of the resource policies. Granting space without strict utilization checks risks inefficient fragmentation of the global pool, yet overly rigid thresholds can stifle legitimate network scaling. Maintaining precise records of every end-site connection helps simplify this validation. The limitation of this approach is the administrative overhead required to generate accurate utilization reports for every subsequent request.

ASN Assignment Eligibility and Reverse DNS Registration Steps

Eligibility for an Autonomous System Number requires an organization to be multihomed or demonstrate the imminent ability to meet this criteria shortly after assignment, representing a significant infrastructure cost barrier to entry for smaller entities. Applicants must select between two-byte only and four-byte AS Numbers based on their specific routing table requirements and future growth projections. The policy outlines the requirements for transferring IPv4 addresses and AS numbers, including the need for a valid technical justification for the transfer to prevent stockpiling.

Registration demands strict adherence to authorization protocols, specifically mandating Route Origin Authorisation and AS-SET requirements to validate path integrity. Maintaining accurate reverse lookup records is a fundamental responsibility for all assigned blocks.

The core policy document governing these assignments, originally published on 05 March 2015, establishes that technical need supersedes financial capacity in allocation decisions. A critical tension exists between the desire for immediate large-scale deployment and the conservation mandates that enforce slow-start mechanisms for new entrants.

Procedures for Executing IPv4 and ASN Transfers

Defining Intra-RIR and Inter-RIR Transfer Boundaries

Intra-RIR movements occur strictly within the APNIC region, whereas Inter-RIR transactions cross jurisdictional borders to counterpart registries under coordinated conditions.

1. Verify that the IPv4 block originates from a valid source within the specific regional boundary.
2. Confirm the recipient meets utilization criteria before initiating the transfer request.
3. Execute the transaction only after validating that the resource type is eligible for transfer under current policy.

Distinct protocols govern Historical Resources, requiring operators to follow specialized procedures separate from standard allocation rules. These legacy blocks often lack current registration data, necessitating rigorous validation steps before any movement is permitted. The policy mandates that transferred addresses must be announced in the global routing table or face revocation, a compliance layer that prevents speculative hoarding of scarce assets. Failure to broadcast the prefix technically validates the assumption of non-use, triggering immediate loss of the resource. This enforcement mechanism ensures that network integrity remains intact by keeping the APNIC Whois Database accurate. Operators managing these transitions through InterLIR must recognize that geographical boundaries define the applicable rule set, not the technical configuration. A transfer failing to meet the announcement requirement results in the resource returning to the available pool, effectively nullifying the commercial transaction.

Executing ASN and IPv4 Transfer Steps for Holders

Resource holders initiate IPv4 Transfers by validating that the target block is announced in the global routing table to avoid immediate revocation.

1. Confirm the recipient holds an active APNIC account and meets utilization criteria.
2. Submit the transfer request through the appropriate administrative channel for review.
3. Ensure the ASN Transfers comply with Inter-RIR agreements if crossing regional boundaries.
4. Update registration details to reflect the new steward to maintain database accuracy.

Operators moving Historical Resources must follow distinct validation steps separate from standard market transactions. While IPv6 Transfers adhere to the specific policies outlined in the IPv6 section, IPv4 movements face stricter scrutiny regarding operational deployment. A critical tension exists between market liquidity and conservation; transfers enable immediate connectivity but require documented use in future address requests to prove continuity of stewardship. Recipients without existing IPv4 holdings must demonstrate a detailed usage plan to justify the request. The primary risk involves speculative holding, where unannounced prefixes technically validate assumptions of non-use, triggering automatic recovery mechanisms. This enforcement ensures that finite IPv4 inventory remains active in the global system rather than stagnant in ledgers. Unlike private sales, these regulatory layers mandate technical proof of deployment as a condition of title retention.

Navigating Mergers, Acquisitions, and Temporary Assignment Risks

Corporate restructuring triggers immediate obligations to update registration details and amend membership agreements under APNIC policy.

1. Submit proof of legal succession to validate the entity change.
2. Revise Historical Resources records to reflect current ownership structures.
3. Confirm that no IPv4 Transfers violate regional utilization rules during the transition.

Failure to align legal status with database records renders the ASN Transfers invalid and risks administrative suspension. Temporary assignments introduce distinct volatility, as account holders face mandatory return obligations once the set period expires. Unlike permanent allocations, these resources become unavailable if the operator ignores the return clause, effectively freezing capacity planning.

A critical tension exists between maintaining operational continuity during a merger and satisfying the strict announcement requirements for transferred blocks. While legal entities merge, the technical mandate remains that any delegated IPv4 addresses not announced in the global routing table face revocation. This enforcement mechanism ensures resources are not hoarded speculatively during corporate transitions but creates a narrow compliance window for integrating networks. Operators must prioritize the technical announcement of the block to avoid losing the asset entirely.

Defining Technical Need and Consensus Constraints in APNIC Policy

APNIC evaluates requests by verifying documented infrastructure plans rather than accepting financial capability as sole justification for resource distribution.

The governance model operates on a consensus-based framework where organizations must demonstrate specific technical need to obtain allocations. This requirement prevents stockpiling by ensuring that distributed IPv4 blocks serve active network segments instead of speculative holdings. Applicants requesting Autonomous System Numbers must prove they are multihomed with a distinct routing policy, a constraint that market forces alone cannot enforce. The policy explicitly treats these identifiers as shared resources available only to those validating operational necessity through registration services.

Financial solvency satisfies membership fees but fails to meet the strict utilization thresholds required for additional address space. Operators must refer to separate documents regarding membership and fees because the core policy prioritizes distribution principles over monetary valuation. This approach creates a tension where capital-rich entities cannot bypass technical vetting processes designed to conserve scarce Internet Protocol version 4 inventory.

The limitation of this system is that valid technical projects without immediate funding may face delays while securing capital, whereas well-funded but poorly planned requests face immediate rejection.

Meanwhile, the IPv6 allocation algorithm successively sub-divides the free pool from the starting address to maximize aggregation. This mechanism prevents fragmentation by assigning the latter half of split blocks while reserving preceding addresses for future continuity. Operators relying on this structured distribution avoid the inefficiencies of random assignment models common in legacy systems. The limitation is strict adherence to utilization metrics; requesting space without immediate deployment plans violates conservation principles. Consequently, network planners must align infrastructure rollout schedules precisely with allocation requests to maintain compliance.

Conversely, obtaining an Autonomous System Number demands proof of distinct routing policies through verified connectivity. An organization must demonstrate it is multihomed or possesses the immediate technical capacity to establish such links before assignment occurs. This requirement filters single-homed entities that unnecessarily inflate the global routing table with non-essential paths. A critical tension exists between rapid market entry and the technical readiness required for valid ASN issuance. Applicants often underestimate the configuration complexity needed to satisfy these eligibility checks. Strict enforcement of these criteria preserves the stability of the global routing table against unnecessary expansion.

Checklist for LIRs to Ensure Fair and Equitable Downstream Assignments

Local Internet Registries must validate that every downstream ISP receives resources based on technical necessity rather than organizational scale. Adherence to this mandate requires a systematic review of internal assignment logs against the hierarchical permissions set in recent community discussions. Operators should cross-reference their delegation records with the specific structural relationships governing LIRs and subordinate ISPs. Failure to align with these evolving standards risks non-compliance during administrative audits.

Operators must prioritize fixing incorrect registration in APNIC Whois to maintain database integrity. The limitation of this rigorous approach is the administrative overhead required to verify downstream claim against conservation goals. InterLIR recommends documenting all rejection rationales to demonstrate impartiality. This transparency protects the registry from accusations of favoritism while enforcing scarcity management.