North America’s ARIN Officially Reaches IPv4 Addresses Depletion

The American Registry for Internet Numbers (ARIN) has issued the final IPv4 addresses in its free pool, this effectively means that the ARIN no longer holds any IPv4 addresses. Due to depletion of its IPv4 Free Pool, ARIN is no longer able to fulfill requests for IPv4 address space unless you are an organization requesting a small block of IPv4 address space to facilitate the transition to IPv6 (per NRPM 4.10) or micro-allocations for specific purposes such as the operation of exchange points (per NRPM 4.4 and 6.10 ).

The update was made in an ARIN announcement below

On 24 September 2015, ARIN issued the final IPv4 addresses in its free pool. ARIN will continue to process and approve requests for IPv4 address blocks.  Those approved requests may be fulfilled via the Wait List for Unmet IPv4 Requests, or through the IPv4 Transfer Market.

Exhaustion of the ARIN Free Pool does trigger changes in ARIN’s Specified Transfer policy (NRPM 8.3) and Inter-RIR Transfer policy (NRPM 8.4). In both cases, these changes impact organizations that have been the source entity in a specified transfer within the last twelve months:

“The source entity (-ies within the ARIN Region (8.4)) will be ineligible to receive any further IPv4 address allocations or assignments from ARIN for a period of 12 months after a transfer approval, or until the exhaustion of ARIN’s IPv4 space, whichever occurs first.”

Effective today, because exhaustion of the ARIN IPv4 free pool has occurred for the first time, there is no longer a restriction on how often organizations may request transfers to specified recipients.

In the future, any IPv4 address space that ARIN receives from IANA, or recovers from revocations or returns from organizations, will be used to satisfy approved requests on the Waiting List for Unmet Requests. If we are able to fully satisfy all of the requests on the waiting list, any remaining IPv4 addresses would be placed into the ARIN free pool of IPv4 addresses to satisfy future requests.

ARIN encourages customers with questions about IPv4 availability to contact hostmaster@arin.net or the Registration Services Help Desk at +1.703.227.0660.


John Curran
President and CEO
American Registry for Internet Numbers (ARIN)

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