[arin-ppml] AFRINIC And The Stability Of The Internet Number Registry System

Jon Lewis jlewis at lewis.org
Tue Aug 31 22:08:44 EDT 2021

On Wed, 1 Sep 2021, Michel Py via ARIN-PPML wrote:

> Hi list and ARIN,
> I have a dumb question : under what conditions is it OK to use an ARIN IP address in another RIR region ?
> I have a specific situation in mind : a global organization (with physical infrastructure in all 5 RIRs) is using ARIN addresses in a country in the RIPE region (and most likely elsewhere).
> I do not want to point fingers, as I suspect that this is a quite common situation. But it is related to the subject at hand.

This used to be a grey area open to interpretation.  Some years ago, it 
became official policy.  Check out section 9 of the NRPM (Out of Region 
Use).  Basically, as long as certain conditions are met (designed to 
discourage RIR-shopping by out of region organizations), it is explicitly 

  Jon Lewis, MCP :)           |  I route
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