Policy 2006-3: Capturing Originations in Templates

Status: Adopted - NRPM Section 3.5

Tracking Information

Discussion Tracking

Mailing List:

Formal introduction on PPML on 17 February 2006

To be revised - 14 April 2006
Staff Assessment - 4 October 2006
Last Call - 13-27 October 2006 Public Policy Mailing List

ARIN Public Policy Meeting:


ARIN Advisory Council:

16 February 2006
23 March 2006
11 April 2006
25 May 2006
15 June 2006
20 July 2006
17 August 2006
21 September 2006
12 October 2006
2 November 2006

ARIN Board of Trustees:

Adopted on 16 November 2006



28 March 2007


Sandra Murphy

Proposal type: new

Policy term: permanent

Policy statement:

ARIN will collect an optional field in all IPv4 and IPv6 address block transactions (allocation and assignment requests, reallocation and reassignment actions, transfer and experimental requests). This additional field will be used to record a list of the ASes that the user permits to originate address prefixes within the address block.

ARIN will produce a collection of the mappings from address blocks to ASes permitted to originate that address block, The collection will consist of a list where each entry will consist, at a minimum, of an address block, a list of AS numbers, and a tag indicating the type of delegation of the address block. This collection will be produced at least daily.

ARIN will make the collected mappings from address blocks to AS numbers available for bulk transfer in one or more formats chosen at its own discretion, informed by the community's current needs. This data will not be subject to any redistribution restrictions -- it may be republished or repackaged it any form. Should ARIN choose to use WHOIS bulk transfer as the bulk form of data access required by this paragraph, the address block to AS mappings will not be subject to any redistribution restrictions, but the remainder of the WHOIS data will remain subject to the terms of the then-current AUP regarding bulk access to WHOIS data.

ARIN may also make the collected or individual mappings from address blocks to AS numbers available in other forms, possibly query services, chosen at its own discretion, informed by the community's current needs. ARIN may require agreement to an acceptable use policy for access to the data in these forms.


Origination of prefixes by ASes that have no authority for the origination is a recurring problem in the Internet routing system. A list of authorized prefix originations would be beneficial to operators in

  • constructing routing filter lists to counter bogus originations,
  • interacting with customers requesting routing of a prefix, and
  • diagnosing routing problems.

A list of authorized prefix originations is also the necessary first step for any known solution for securing the routing system.

Prefix originations can be stored in routing registry RPSL route objects. However, the authority for addresses and for ASes belongs to the RIRs. There is presently no mechanism to translate ARIN's authority for number resources to an IRR. Furthermore, operators have been less than diligent in creating and maintaining route objects. Capturing the prefix origination authorization in number resource registrations with ARIN has two main goals:

  • benefit from the scrutiny with which ARIN verifies initial requests and authenticates subsequent transactions, and
  • inherit the operators' self-discipline in completing resource requests and transactions.

As an additional benefit, this could take a step toward populating the IRR with data known to be accurate.

The intended use of this data means that both query for individual entries and bulk access to a list of the collected entries, without restriction on redistribution, is required. This policy requires that the additional data be provided through the usual whois query service and some bulk access service that has no restrictions. It permits ARIN to provide the bulk access through the existing bulk whois service if the new additional data is not subject to the bulk whois AUP restrictions. The policy does not limit ARIN to providing only those two services (whois query and unrestricted bulk access); other additional services may be developed at ARIN's discretion.

It is expected that entries in the list of collected entries will include at a minimum the present NetRange and NetType attributes, with a new attribute, perhaps named OriginatingASList, for the list of permitted originating ASes.

This policy will presumably be incorporated into NRPM section 3.4.

Timetable for implementation: Within sixty (60) days of approval.