Subsequent delegation criteria


IPv4 requests will be assessed under Part 2 of the APNIC Internet Number Resource Policies.


Criteria for Subsequent LIR delegation

After receiving an initial LIR delegation, all subsequent delegations will depend on the following:

  • The LIR’s verified usage rate (which is the rate at which the LIR made delegations from relevant past address space, including historical delegations)
  • Their documented plans for address space, and
  • Their degree of compliance with APNIC policies with respect to relevant past delegations.

Criteria for small multihoming delegations

  • An organization is eligible if it is currently multihomed with provider-based addresses, or demonstrates a plan to multihome within one month.
  • Organizations requesting a delegation under these terms must demonstrate that they are able to use 25% of the requested addresses immediately and 50% within one year.

Criteria for Internet Exchange Points

  • Internet Exchange Points (IXP) are eligible to receive a delegation from APNIC to be used exclusively to connect the IXP participant devices to the Exchange Point.
  • Global routability of the delegation is left to the discretion of the IXP and its participants.

Criteria for critical infrastructure

The following critical infrastructure networks, if operating in the Asia Pacific region, are eligible to receive a delegation:

  • Root domain name system (DNS) server
  • Global top level domain (gTLD) nameservers
  • Country code TLD (ccTLDs) nameservers
  • IANA
  • Regional Internet Registry (RIRs)
  • National Internet Registry (NIRs)


Subsequent allocations of IPv6 address space will depend on certain criteria being fulfilled in accordance with relevant address management policies.

The HD-Ratio (RFC 3194) is used to justify the allocation of additional address space.


After an initial allocation, subsequent allocations depend on:

Applied HD-Ratio

  • Organizations satisfying the evaluation threshold of past address utilization in terms of the number of sites in units of /56 assignments
  • An HD-Ratio of 0.94 being reached. This indicates acceptable address utilization for justifying the allocation of additional address space
  • Documentation justifying address space requirements for a two-year period.

When acceptable address utilization is achieved, the organization is immediately eligible to get more addresses, resulting in a doubling of the address space allocated to it.

Alternative allocation

Alternatively, a subsequent allocation may be provided where an organization (ISP/LIR) can demonstrate a valid reason for requiring the
subsequent allocation. For guidelines on what will be considered a valid technical or other reason, see “APNIC guidelines for IPv6 allocation and assignment requests”.

Where possible, the allocation will be made contiguously.

Related policy

Part 3 of the APNIC Internet Number Resource Policies