Global Policy for the Allocation of IPv4 blocks to Regional Internet Registries
NOTE: In October 2010, ICANN announced that the NRO deemed the global policy proposal abandoned due to differences in the global proposal texts among the RIRs. Hence this proposal, although regionally accepted, will never be globally implemented. The ICANN announcement is available online at:
Summary of Proposal:
With the depletion of the IANA free pool of IPv4 address space, the current policy regarding the allocation of IPv4 address space to the RIRs will become moot. The RIRs may, according to their individual policies and procedures, recover IPv4 address space. This policy provides a mechanism for the RIRs to retro allocate the recovered IPv4 address space to the IANA and provides the IANA the policy by which it can allocate it back to the RIRs on a needs basis. This policy creates a new global pool of IPv4 address space that can be allocated where it is needed on a global basis without a transfer of address space between the RIRs.
This document describes the policy governing the allocation of IPv4 address space from the IANA to the Regional Internet Registries (RIRs).
This document does not stipulate performance requirements in the provision of services by the IANA to an RIR in accordance with this policy. Such requirements should be specified by appropriate agreements among the RIRs and ICANN.
2.1 Recovered address space
Recovered address space is that address space that is returned to an RIR as a result of any activity that seeks to reclaim unused address space or is voluntarily returned to the RIR or is reclaimed by the RIR as a result of legal action or abuse determination. Recovered address space does not include that address space that is reclaimed because of non-payment of contractual fees whose reclamation date is less than one year at the time of the report.
2.2 IPv4 address holdings
IPv4 address holdings are all unallocated IPv4 address space held by an RIR to include recovered address space not yet returned less that address space that is committed in accordance with the RIR's reservation policy and practices.
3. Details of the Policy
This policy is to be implemented in two phases:
- Phase I: Recovery of IPv4 address space
- Phase II: Allocation of recovered IPv4 address space by the IANA
3.1 Phase I: Recovery of IPv4 address space
Upon ratification of this policy by the ICANN Board of Directors the IANA shall establish a mechanism to receive IPv4 address space which is returned to it by the RIRs, and hold that address space in a 'recovered IPv4 pool'.
Each RIR through their respective chosen policies and strategies may recover IPv4 address space which is under their administration. Each RIR shall at quarterly intervals return any such recovered address space to the IANA in aggregated blocks of /24 or larger, for inclusion in the recovered IPv4 pool.
During Phase I, no allocations will be made from the recovered IPv4 pool.
3.2 Phase II: Allocation of recovered IPv4 address space by the IANA
Upon ratification of this policy by the ICANN Board of Directors and a declaration by the IANA that its existing free pool of unallocated IPv4 address space is depleted; Global Addressing Policy ASO-001-2 (adopted by ICANN Board on 8 April 2005) is rescinded. IANA will then commence to allocate the IPv4 address space from the recovered IPv4 pool.
3.2.1 Allocation of IPv4 address space
- For the purposes of this policy, an 'IPv4 allocation period' is defined as a six-month period following 1 March or 1 September in each year.
- At the beginning of each IPv4 allocation period, the IANA will determine the 'IPv4 allocation unit' for that period, as 1/10 of its IPv4 address pool, rounded down to the next CIDR (power-of-two) boundary.
- In each allocation period, each RIR may issue one IPv4 request to the IANA. Providing that the RIR satisfies the allocation criteria described section 3.2.2, the IANA will allocate a single allocation unit, composed of the smallest possible number of blocks available in its IPv4 address pool.
3.2.2 IPv4 address space allocation criteria
An RIR is eligible to receive additional IPv4 address space from the IANA when the total of its IPv4 address holdings is less than 50% of the current IPv4 allocation unit, and providing that it has not already received an IPv4 allocation from the IANA during the current IPv4 allocation period.
3.2.3 Initial allocation of IPv4 address space
Each new RIR shall, at the moment of recognition, be allocated one (1) allocation unit by the IANA. If an allocation unit is not available, then the IANA will issue this block as soon as one is available. This allocation will be made regardless of the newly formed RIR's projected utilisation figures and shall be independent of the IPv4 address space that may have been transferred to the new RIR by the already existing RIRs as part of the formal transition process.
- All returned space is to be recorded in an IANA-published log of IPv4 address space transactions, with each log entry detailing the returned address block, the date of the return, and the returning RIR.
- All allocated space is also to be recorded in this IANA-published log of IPv4 address space transactions, with each log entry detailing the address blocks, the date of the allocation and the recipient RIR.
- The IANA will maintain a public registry of the current disposition of all IPv4 address space, detailing all reservations and current allocations and current IANA-held address space that is unallocated.
- The IANA may make public announcements of IPv4 address block transactions that occur under this policy. The IANA will make appropriate modifications to the "Internet Protocol V4 Address Space" page of the IANA website and may make announcements to its own appropriate announcement lists. The IANA announcements will be limited to which address ranges, the time of allocation and to which Registry they have been allocated.
a. Arguments supporting the proposal
The policy provides a mechanism for the ongoing distribution of IPv4 address space.
b. Arguments opposing the proposal
Timetable for Implementation:
This policy is to be implemented immediately upon ratification by the ICANN Board of Directors according to the global policy process described in the ASO MoU.
Note: In order to provide additional information related to the proposal, details of an impact analysis carried out by the RIPE NCC are documented below. The projections presented in this analysis are based on existing data and should be viewed only as an indication of the possible impact that the policy might have if the proposal is accepted and implemented.
A. Impact of Policy on Registry and Addressing System
Address/Internet Number Resource Consumption:
After analysing the data that is currently available, the RIPE NCC does not anticipate that any significant impact will be caused if this proposal is implemented.
There is not enough data to perform a reliable analysis for the proposed policy regarding its impact on fragmentation/aggregation. Factors that could possibly have an effect on fragmentation/aggregation are:
- Reclamation rate starting from the implementation of Phase I of the proposed policy
- Number, size and distribution of blocks reclaimed by the RIRs
- The size of requests received after this proposed policy is in place, and their relation of the sizes of blocks the RIRs receive from IANA due to this policy
About one million IPs are reclaimed per year from closed LIRs.
B. Impact of Policy on RIPE NCC Operations/Services
After analysing the data that is currently available, the RIPE NCC does not anticipate that any significant impact will be caused on Registration Services if this proposal is implemented.
C. Legal Impact of Policy
After analysing the data that is currently available, the RIPE NCC does not anticipate that the implementation of this proposed policy will cause any significant legal implications.