[arin-ppml] Revised - Draft Policy ARIN-2017-9: Clarification of Initial Block Size for IPv4 ISP Transfers

ARIN info at arin.net
Wed Jan 24 08:42:28 EST 2018

The following has been revised:

* Draft Policy ARIN-2017-9: Clarification of Initial Block Size for IPv4 
ISP Transfers

Revised text is below and can be found at:

You are encouraged to discuss all Draft Policies on PPML. The AC will 
evaluate the discussion in order 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:

Draft Policies and Proposals under discussion can be found at:


Sean Hopkins
Policy Analyst
American Registry for Internet Numbers (ARIN)

Draft Policy ARIN-2017-9: Clarification of Initial Block Size for IPv4 
ISP Transfers

Problem Statement:

It was noted in the ARIN 40 Policy Experience Report, that there is an 
inconsistency in the initial block size for ISPs. Section 4.2.2 notes 
that the initial ISP block size should be /21 whereas the initial block 
size in 8.5.4 is noted as "minimum transfer size" which is effectively a 
/24. This causes ISP organizations to be approved for different initial 
block size depending on if they first apply for a transfer directly 
under section 8 or if they apply for a block under section 4.  This 
policy is intended to clarify this issue, by setting a consistent ISP 
initial IPv4 block size. It was noted that ARIN staff current 
operational practice is to allow qualified ISPs an initial /21 for 
Section 8 transfers when they first apply and are approved under section 
4.  If an organization applies under section 8 first they are initially 
qualified for a /24; larger allocations require additional documentation 
as noted in 8.5.5.

Policy statement:

Replace section 8.5.4;

8.5.4. Initial block

Organizations without direct assignments or allocations from ARIN 
qualify for the transfer of an initial IPv4 block, a /24 for assignments 
or a /24 up to a /21 for allocations.


Timetable for implementation: Immediate

Anything Else:

The ARIN 40 Policy Experience Report is available at;



Video: https://www.youtube.com/watch?v=QVsfVMG_6fA

Slides 10 - 13, located in the video from 6:30 to 8:30, are the relevant 
portion of the report, questions from the audience follow.

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