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Specified Transfer Listing Service

The Specified Transfer Listing Service (STLS) allows for the facilitation of Transfers between Specified Recipients within the ARIN Region (NRPM 8.3) and Inter-RIR Transfers (NRPM 8.4). For additional information, please see the "Specified Transfer Listing Service (STLS)" tab on the main Transfer page.

The Specified Transfer Listing Service (STLS) allows for the facilitation of Transfers between Specified Recipients within the ARIN Region (see NRPM 8.3) and Inter-RIR Transfers (see NRPM 8.4).For additional information, please see the "Specified Transfer Listing Service (STLS)" tab on the main Transfer page.


Before participating in ARIN's STLS, please review ARIN's Resource Transfer guidelines and the Number Resource Policy Manual (NRPM) to ensure your organization qualifies for a resource transfer. ARIN Registration Services staff vet all STLS participants, and requires adequate documentation to ensure the right to transfer. All STLS participants must be current on all ARIN payments.

Requesting STLS Participation

Note: Organizations that want to list a need for IPv4 addresses through the STLS must have established Point of Contact (POC) handle(s) and an Organization Identifier (Org ID) with ARIN.

Note: Before registering as a seeker in ARIN's STLS, create a Point of Contact record (POC) and an Organization Identifier (Org ID) within ARIN online before requesting participation.

To request STLS Participation, simply log into your account, select DOWNLOADS & SERVICES from the left, and scroll down to the STLS Participation Request form. All participants will be required to electronically accept the STLS Terms of Service (TOS).

Upon submission, ARIN will verify receipt of your request and issue you a ticket number. ARIN responds to STLS participation requests within two business days via your Message Center, found on the left menu of ARIN Online. If more information is required, it will be requested via your Message Center as well. Note that a request for additional information does not imply a denied request.

Note: each response cycle will generally take two business days. If ARIN does not receive a response within 90 days, the associated ticket will be closed. 

For questions about pending requests, send a reply to the ticket through ARIN Online, or call ARIN's Registration Services Help Desk at +1.703.227.0660. Please have the following available when you call:

  • Your ticket number
  • Access to and ARIN Online
  • Any requested documentation
  • The name of the analyst who assisted you previously, if applicable

Click here for additional guidance on calling the Help Desk

Request Approval

Upon approval, ARIN will notify you via your Message Center. This approval is valid for 90 days. If no response to the approval message is received within 90 days, your request will need to be resubmitted.

Note: STLS seekers must provide an Officer Attestation certifying the accuracy of the request data prior to final approval.

Please contact Registration Services with any questions by replying to the ticket or using the ASK ARIN feature in your ARIN Online account. Alternatively, you may contact

Fees & Registration Services Agreement

ARIN charges a $100 fee for STLS participation. These fees offset the cost of operating the STLS service. Additional fees will apply for approved transfers and for recurring registration of the transferred IPv4 addresses.

Payment may be submitted in one of two ways: by logging into ARIN Online and selecting BILLING INFO on the left, or by using this payment form and providing the appropriate Org ID, Invoice number, and the exact amount due on the invoice.

For more information regarding payments, please visit ARIN's Make a Payment page.

STLS Access and Retrieval

ARIN will provide STLS access to approved participants within two business days of ARIN's receipt of the listing fee. All STLS participants will have full access to all contact information provided for all registered seekers, listers, and facilitators via the DOWNLOADS & SERVICES menu option within ARIN Online.

What Next?

Participants should contact each other directly to arrange a transfer. Once two participants agree on a transfer, both parties should submit the appropriate transfer request. Visit the Transfers page for detailed instructions on Transfers to Specified Recipients or Inter-RIR Transfers.

Removal from STLS

Upon completion of a transfer between STLS participants, both involved parties will have their STLS listings and access removed upon completion of a transfer unless they have additional resources still listed. Subsequent STLS access will require resubmitting an STLS participation request.

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Registration Services Help Desk

Interacting With ARIN

Monday through Friday
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Phone: +1.703.227.0660
Fax: +1.703.997.8844
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