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Specified Transfer Listing Service

Overview

The Specified Transfer Listing Service (STLS) facilitates the transfer of IPv4 addresses under Number Resource Policy Manual (NRPM) 8.3 (“Transfers to Specified Recipients”). The STLS is available to validated organizations that have IPv4 addresses available for transfer ("lister") and to organizations that have a demonstrated need for IPv4 addresses ("seeker"). Additionally, the STLS allows entities to facilitate these transfers between agreeing parties ("facilitator").

All STLS participants will have full access to all contact information provided for all registered seekers and listers. This information may be accessed through the DOWNLOADS & SERVICES option within ARIN Online by any seeker, lister, or facilitator registered to use ARIN's STLS.

ARIN will produce a summary for public use that includes the number of IPv4 number resources potentially available (tallied by available address block size) and a summary of the IPv4 number resources needed (tallied by needed address block size).  The public STLS summary will be updated as participation in the service changes, and it will not contain any organizational name or contact information.

Note: Requests to receive IPv4 addresses through STLS are subject to the same policy criteria as requests submitted directly to ARIN. ARIN will continue issuing new IPv4 registrations as long as supply is available to fill those requests. Instructions for requesting IPv4 addresses directly from ARIN can be found on the Requesting A Resource from ARIN page.

Participation

Participation in the Specified Transfer Listing Service is completely voluntary, All organizations participating in the STLS must agree to the STLS Terms of Service and will be subject to vetting by ARIN’s Registration Services Department.

IPv4 number resources that will be listed as available for transfer must be covered under a current Registration Services Agreement (RSA) or Legacy Registration Services Agreement (LRSA.) Requests to receive IPv4 addresses through the STLS are subject to the same policy criteria as requests submitted directly to ARIN. ARIN will continue issuing new IPv4 registrations as long as supply is available to fill those requests. Instructions for requesting IPv4 addresses directly from ARIN can be found on the Requesting A Resource from ARIN page.

Click one of the following links below regarding users of ARIN's STLS:

Frequently Asked Questions (FAQ)

1) Do I have to participate in the Specified Transfer Listing Service in order to make use of the “Transfer to Specified Recipients” policy? 

No, you do not have to participate in the service to make use of the policy; organizations that have independently come together for this purpose may contact ARIN to initiate a specified recipient transfer if they meet the policy requirements.

2) Why would anyone make use of this service in the period when ARIN is able to satisfy IPv4 number resource requests?

While organizations may not be interested in completing a specified recipient transfer at this time, providing the Specified Transfer Listing Service provides information which may assist organizations in planning for the period when ARIN will not be able to routinely satisfy IPv4 number resource requests. Additionally, while IPv4 requests are limited to a three-month supply, specified transfer recipients may receive up to a 24-month supply of IPv4.

Information regarding IPv4 Requests: IPv4 IANA Free Pool Depletion – FAQ

3) Do I have to participate in the Specified Transfer Listing Service (STLS) in order to be considered for future IPv4 numbers resources that might become available to ARIN?  What will happen to my approved request if no IPv4 number resources are available to be issued?

You do not have to participate in the Specified Transfer Listing Service to be considered for future IPv4 number resources that might become available to ARIN.

Under current policy, if your request is approved (but no number resources are available), your approved request will be held until number resources are available and will be satisfied in the order of approval.  As this may take considerable time, organizations in these circumstances will be asked if they wish to be added to the Specified Transfer Listing Service and contacted by qualified organizations who could potentially free up sufficient IPv4 number resources to meet their approved request.

4) Why would another organization go through the effort to free up IPv4 number resources to help my organization?

ARIN does not presume any particular relationship or motivation between organizations using the “Transfer to Specified Recipients” policy, although it does confirm that both current holder and recipient fully agree to proceed without reservation before consummating the number resource transfer.  It is likely that some consideration will be involved between organizations but ARIN will not be a party to receive the consideration.  ARIN reserves the right to require disclosure of the amount of the consideration exchanged so it can provide the community with aggregated data regarding such transactions.  We are not contemplating identifying specific transactions or parties. 

5) It does not appear that ARIN is providing matching or auction services to organizations via this service; why not?

These services are generally available already, and organizations participating in the Specified Transfer Listing Service are provided contact information to validate qualified bidders for IPv4 number resources or qualified number resource listings respectively.

6) What fees apply when performing specified recipient transfer?

ARIN’s Fee Schedule details the fee for number resource transfers applies to any specified recipient transfer. ARIN’s usual fee schedule applies for all number resources held under a registration services agreement, and this includes number resources received from ARIN via the specified recipient transfer policy. 

7) Where are STLS entries publicized?

The specific entries in the Specified Transfer Listing Service will be available on a web page accessible only to those registered STLS participants as noted above.  Access will be provided via ARIN Online.

ARIN will produce a summary for public use that includes the number of IPv4 number resources potentially available (tallied by available address block size) and a summary of the IPv4 number resources needed (tallied by needed address block size).  The public SLTS summary will be updated as participation in the service changes, and it will not contain any organizational name or contact information.

8) How long will ARIN's STLS be available?

The Specified Transfer Listing Service will operate indefinitely as long as adequate demand exists for the service.   ARIN reserves the right to modify or discontinue the service with appropriate advanced notice to participating parties.