[arin-ppml] ARIN-prop-128: Replacement of Section

ARIN received the following policy proposal and is posting it to the
Public Policy Mailing List (PPML) in accordance with the Policy
Development Process.

The ARIN Advisory Council (AC) will review the proposal at their next
regularly scheduled meeting (if the period before the next regularly
scheduled meeting is less than 10 days, then the period may be extended
to the subsequent regularly scheduled meeting). The AC will decide how
to utilize the proposal and announce the decision to the PPML.

The AC invites everyone to comment on the proposal on the PPML,
particularly their support or non-support and the reasoning
behind their opinion. Such participation contributes to a thorough
vetting and provides important guidance to the AC in their deliberations.

Draft Policies and Proposals under discussion can be found at:

The ARIN Policy Development Process can be found at:

Mailing list subscription information can be found


Communications and Member Services
American Registry for Internet Numbers (ARIN)

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ARIN-prop-128: Replacement of Section

Proposal Originator: Martin Hannigan, Chris Grundemann

Proposal Version: 1.0

Date: 21 January 2011

Proposal type: Modify, complete replacement of

Policy term: Permanent

Policy statement: Subscriber Members After One Year

After an organization has been a subscriber member of ARIN for one
year,that organization may choose to request up to a 12 month supply of
IP addresses.

On the date that ARIN's IPv4 aggregate inventory of IPv4 address
space drops below the equivalent of 2/8's and after ARIN receives its
last /8 as a result of the IANA executing section of the NRPM
and in accordance with the Global Policy for the Allocation of the
Remaining IPv4 Address Space, the length of supply that any organization
may request from ARIN from that moment forward will be reduced to three

Inventory is defined as all unused IPv4 addresses held by ARIN. This
includes legacy address space which will be added to the available
inventory and used after no longer than a one month hold period. Any
addresses that the organization declares unavailable will be detailed
publicly on a monthly basis that includes a detailed justification.
Unavailable IPv4 addresses shall be considered to be an exception, not
a rule.

This reduction does not apply to resources received through the
utilization of NRPM Section 8.3 of the NRPM. An organization receiving a
transfer under NRPM Section 8.3 may continue to request up to a 12-month
supply of IP addresses.


ARIN's pending operational practice is that if an organization has a
request in the ARIN hostmaster queue for IPv4 resources when the IANA
declares the exhaustion phase (, their request will be
automatically truncated from a twelve month supply to a three month
supply since policy in effect at the time of exhaustion will apply. 8.3
and are currently "in effect".

Example: If an entity is asking for 4 x /24 for a 12 month period and
IANA exhaustion occurs, a requester will receive, if justified, 1 x /24.
If an entity is asking for 120 x /24 at the time that exhaustion occurs,
they would only receive 30 x /24 if justified. If ARIN determines that
this same entity would only qualify for 90 of the 120 x /24 requested,
then that entity would only receive 22 x /24.

ARIN has the equivalent of approximately 7 /8's in their current
inventory of address space equaling roughly 117M addresses. This
includes addresses churning (revocations, returned), legacy addresses
returned and the final /8 ARIN has received as a result of the execution
of policy directing the IANA to exhaust inventory when it reaches 5 /8s.

The intention of this proposal is simple. To define how as a community
we will wind-down IPv4 inventory in an fair, orderly and predictable
manner and to prevent the organization from being in a state of
unreasonably stockpiling IPv4 addresses. It is also intends to insure
that any confusion around legacy address utilization is clear; in the
absence of a global policy dealing with this issue and need exists in
the ARIN region any unused address in ARIN's inventory must be used.

The ARIN AC should review and determine what action if any should be
taken at their next available opportunity, or sooner if they deem warranted.