[arin-ppml] Update on ARIN Policy 2025-8 Reserve 4.10 Space for In-Region Use

[David Farmer]

I disagree with this policy as written. Simply adding "within the ARIN
service area" to the current wording prevents a scenario that should be
permitted and allows a scenario that some people would believe should be
disallowed.

1. Someone with an ARIN IPv6 allocation that they are using globally,
according to section 9, Out of Region Use, should also be able to use their
4.10 allocation to provide NAT64 for their IPv6 allocation. The current
language prevents this because it involves a potential IPv6
deployment outside the ARIN service area.

2. Conversely, the current policy seems to allow someone with an IPv6
allocation from another RIR, but used within the ARIN region, to qualify
for a 4.10 allocation. This would involve deploying IPv6 within the ARIN
service area.

3. Obviously, we don't want someone to receive a 4.10 allocation from ARIN
and then use it with an IPv6 allocation from another RIR completely outside
the ARIN service area.

Instead, a 4.10 allocation MUST only support ARIN IPv6 allocations and MUST
NOT be used outside the intended scope of those IPv6 allocations. In other
words, the 4.10 allocation SHOULD be used concurrently and congruently with
the IPv6 allocations, allowing the 4.10 allocation to be used outside the
ARIN service region if and only if the IPv6 allocations are also being used
outside the ARIN service region in accordance with section 9, Out of Region
Use.

I recommend adding a new bullet point to section 4.10, as illustrated below.

   - Allocations made under this policy must be used only to support IPv6
   allocations made by ARIN. Further, the use of the allocation must be
   concurrent and congruent with these IPv6 allocations.

This bullet aims to allow #1 and disallow #2 and #3 from the list above.

Thanks!

On Fri, Dec 12, 2025 at 12:28 PM Pellak, Kaitlyn via ARIN-PPML <
arin-ppml at arin.net> wrote:

> Hello PPML,
>
>
>
> I’m writing to give you all an update on 2025-8: Reserve 4.10 Space for
> In-Region Use after our Public Policy Meeting in October and completion of
> the Staff and Legal review.
>
>
>
> This policy was *presented as a draft at ARIN 56 in Texas
> <https://www.arin.net/participate/meetings/ARIN56/day1_transcript/#draft-policy-arin-2025-8-reserving-4-10-space-for-in-region-use>*.
> There was no concern from the attendees at the meeting about this policy
> and it received positive feedback. The community was in agreement that this
> policy will bring the NRPM (specifically 4.10) into alignment with how ARIN
> staff are already interpreting the policy.
>
>
>
> The staff and legal review, completed November 12, reaffirms this
> intention: “This policy does not alter existing review practices; it
> formally documents the longstanding approach ARIN staff has used and will
> continue to apply.”
>
>
>
> With this in mind, we plan to move the policy to recommended draft at our
> December meeting. My question to the ppml: is the language of the policy
> sufficient and do you agree that this policy should be moved to recommended
> draft status? Policy statement below for reference:
>
>
>
> 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”
>
>
>
> Thanks all,
>
> Kaitlyn
>
> Kaitlyn Pellak
>
> Amazon – Technical Business Developer II
>
> *kaitjean at amazon.com <kaitjean at amazon.com>*
>
> 301.921.5566
>
>
>
> [image:
> /Users/tinam/Library/Containers/com.microsoft.Outlook/Data/Library/Caches/Signatures/signature_1323502979]
>
>
>
>
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> ARIN-PPML
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-- 
===============================================
David Farmer               Email:farmer at umn.edu
Networking & Telecommunication Services
Office of Information Technology
University of Minnesota
2218 University Ave SE        Phone: 612-626-0815
Minneapolis, MN 55414-3029   Cell: 612-812-9952
===============================================
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