[arin-ppml] Draft Policy ARIN-2025-8: Reserve 4.10 space for In-Region Use

[ARIN]

On 21 August 2025, the ARIN Advisory Council (AC) accepted “ARIN-prop-347: Reserve 4.10 space for In-Region Use” as Draft Policy. 

Draft Policy ARIN-2025-8: Reserve 4.10 space for In-Region Use

https://www.arin.net/participate/policy/drafts/2025_8

You are encouraged to discuss all Draft Policies on PPML. The AC will evaluate the discussion to assess the conformance of this draft policy with ARIN's Principles of Internet number resource policy as stated in the Policy Development Process (PDP). Specifically, these principles are:

* Enabling Fair and Impartial Number Resource Administration
* Technically Sound
* Supported by the Community

The PDP can be found at:

https://www.arin.net/participate/policy/pdp/

Draft Policies and Proposals under discussion can be found at: https://www.arin.net/participate/policy/drafts/

Regards,

Eddie Diego
Policy Analyst
American Registry for Internet Numbers (ARIN)



Draft Policy ARIN-2025-8: Reserve 4.10 space for In-Region Use

Problem Statement:

ARIN 4.10 allocations, reserved to facilitate IPv6 deployment, currently have no restrictions for out-of-region use beyond the general restrictions laid out in Section 9. As the use of these allocations outside of the ARIN region seems to be contrary to the intentions for use of this space - and ARIN staff has interpreted the policy as such - the prohibition of this practice should be codified in policy.

Policy Statement:

Change the second sentence in NRPM Section 4.10 from:

“This IPv4 allocation will be set aside and dedicated to facilitate IPv6 deployment.”

to:

“This IPv4 allocation will be set aside and dedicated to facilitate IPv6 deployment within the ARIN service area”

Comments:

This proposal was prompted by community feedback to Registration Services, as reported in the ARIN 55 Policy Experience Report. ARIN staff has indicated that there is no intention to extend this restriction to 4.10 allocations assigned before the implementation of this policy.

Timetable for implementation: Immediate