Guide to the recovery of unused address space

  1. Introduction
  2. Address Recovery Process

1. Introduction

These guidelines are intended to complement the policy on the recovery of historical address space described in 4.2.1. Recovery of unused historical address space of APNIC Internet Number Resource Policies. They are intended to guide networks holding historical address space.

Historical address space that has been globally routed at any time since 1 January 1998 is not affected by this policy.


2. Address Recovery Process

The following steps will take place:

Step 1

APNIC identifies historical address space that is not currently being globally routed

APNIC will check the list of historical address ranges against historical routing data available from a prefix announcement database. If addresses from a historical address range have not been routed at all since 1 January 1998, APNIC will begin the process to recover the resources.

Step 2

APNIC notifies the network contacts of the intent to reclaim unrouted resources

APNIC will use the contact details of the admin-c and tech-c for the address range to notify the network of its intent to recover resources.

Step 3

The network responsible for the unrouted resources can choose to return the resources to APNIC or maintain custody

If a network is contacted by APNIC and is notified of APNIC’s intention to recover the unrouted resources, the network can choose to:

  • Return the address range to APNIC
    If a network is happy to return the resources, the resources will be reclaimed for reallocation in the future. For more information, see step 5 below.

Step 4

If there is no response from a network, APNIC will keep trying to contact the network for one year before reclaiming the resources

At the end of one year, if there is still no response from the network, the address range will be reclaimed.

Step 5

Reclaimed resources will be returned to the free pool for redistribution in the future

The origin of the historical resource will affect what happens to the reclaimed resource:

  • The historical resource is an early APNIC or AUNIC allocation
    The inetnum object will be deleted from the database and returned to the free pool for redistribution immediately. Information on historical AUNIC ranges is available at: AUNIC to APNIC migration

  • The historical resource is part of the ERX ranges
    The inetnum object will be deleted from the database. The resource will not be redistributed immediately; however, in the future the resource may be redistributed by APNIC or another RIR. More information about ERX ranges is available at: Early Registration Transfer project (ERX)