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Experimental Allocations

In accordance with Section 2.2 of the Number Resource Policy Manual (NRPM), ARIN issues Internet number resources for use within its region. ARIN allocates Numbering Resources (IPv4, IPv6, and Autonomous System numbers) to entities requiring temporary Numbering Resources for a fixed period of time under terms of recognized experimental activity.  There are strict criteria to define recognized experimental activity:

  • Objectives and practices are described in a publicly accessible document.
  • Outcomes will be published in a publicly accessible document
  • Conditions for concluding the experiment are defined and included in the document.
  • Demonstration that the activity is technically coordinated

ARIN will not recognize experimental activities if the entire research experiment cannot be publicly disclosed.  There is a strong preference for recognition of experimental activity that has been approved for publication by the IESG or by a similar mechanism as implemented by the IETF.

Experimental Allocations are granted on a lease/license basis for a period of one year.  At the end of the experiment, all allocated resources will be returned to the available pool.  ARIN will only make one-off allocations annually to any applicant.  Additional experimental allocations must be separately justified under separate application.

The allocation size should be consistent with the existing ARIN minimum allocation sizes, unless small allocations are part of the experiment.   If the needs of the experiment require a larger allocation, the documentation should clearly describe and justify the requirement.

ARIN reserves the right to withdraw resources when there is evidence that the resource:

  • is being used for commercial purposes
  • is being used for activities not documented in the experiment description

ARIN also reserves the right to modify the allocation in response to assessment of the objectives and technical coordination of the experiment.  If the proposed modification is not acceptable to the requesting organization, an appeal or arbitration are available following normal ARIN procedures.  An appeal or arbitration process may require the requesting organization to provide additional details regarding the experiment, its objectives, and the manner of technical coordination, to assist in resolving the appeal.

Step 1: Requirements

Review ARIN's Experimental Allocation Policy to ensure your request meets the requirements. Requesting resources from ARIN indicates you have read and agree to abide by these policies.

Step 2: Submit Request

Your organization must first have established Point of Contact (POC) handles and an Organization Identifier (Org ID) with ARIN.

An organization can request an experimental allocation from ARIN by submitting the Experimental Allocation request form.  All experimental allocation requests must be sent from the Admin or Tech Point of Contact (POC) associated with the organization's Org ID.

You will need to include an API key on your Experimental Allocation request form to authorize processing. To create an API key, log in to your ARIN Online account and click on the Your Account > Settings link in the left navigation bar. In the API Key Management section, click Create API Key. Your API key will be issued automatically.

Step 3: Verification

We will verify receipt of your request upon successful submission.  We will issue you a ticket number via email.

Step 4: Review Process

We will respond to requests within two (2) business days. We may request additional information. For each question and response cycle, we will respond within two (2) days. If you do not reply within ninety (90) days, the ticket will be closed. A request for additional information does not imply a request denial.

For questions about pending requests, email or call ARIN's Registration Services Help Desk at +1.703.227.0660. When you call, have your ticket number and any requested documentation available, and have access to the ARIN website. For further follow-up, supply the name of the ARIN Resource Analyst who assisted you on your prior call. Click here for additional guidance on calling the Help Desk.

Step 5: Request Approval

ARIN notifies the submitter of request approval, via email. The approval is good for ninety (90) days. If your organization does not follow up on the approval within that time, you will need to resubmit your  request.

If a request is rejected and you feel proper justifications were met, contact ARIN at for further explanation.

Step 6: Fees & Registration Services Agreement

Please review the ARIN Fee Schedule to learn more about how fees are determined.

Upon approval and within one business day, you will receive a detailed message that will include: how to update or designate the Billing Contact, an invoice, ARIN W-9, and instructions to download the Registration Services Agreement (RSA).  

There are two ways to submit online payments to ARIN:

  • Log into ARIN Online and select Payments & Billing from the left-hand side,
  • Or click here.
    • You will need to provide the appropriate Org ID, Invoice number, and the exact amount due on the invoice.

For payments by check, send to:

American Registry for Internet Numbers
P.O. Box 759477
Baltimore, MD 21275-9477

For payment by wire transfer:

  • Email a request to, include the invoice number, the organization name, and Org ID.

Payment information is not accepted by phone. We do not accept purchase orders as the equivalent of payment. The approval request can be dependent on the billing status of the Org ID in question. Outstanding fees due to ARIN must be paid before additional resources are issued or transferred.

Submission of Signed Registration Services Agreement (RSA)

All applicants requesting resources from ARIN are required to sign the Registration Services Agreement (RSA). The RSA must be signed and returned in its entirety for validation before ARIN issues or transfers resources. The language of the agreement cannot be altered or modified. The entire document is required with information to be inserted on page 1 and completing page 9, all applicable fields. The Billing Contact is optional if duplicate of Authorized Officer. *Please ensure the contract is signed by an Authorized Officer of the Company.

Need Help with the ARIN Agreement? Call 703-227-9886, reply to your ARIN Online ticket, or use Ask ARIN.

Remit the completed ARIN agreement by one of the following methods:

  • Reply to your ARIN Online ticket, attaching the signed RSA,as a PDF
  • Fax:  703-227-0671
  • Post:
    • ARIN
      Attention: Financial Services Department
      3635 Concorde Parkway, Suite 200
      Chantilly, VA 20151

ARIN will counter-sign and return a copy for your records after the payment has been confirmed.

Step 7: Assignment of Experimental Allocation

ARIN completes the Experimental Allocation within two (2) business days of ARIN's receipt of the organization's registration fee and a signed Registration Services Agreement (RSA). An experimental allocation does not qualify an organization for ARIN membership. Only organizations that receive and pay for a direct allocation of IP address space from ARIN are automatically accorded membership.

As membership is open to all qualifying interested parties, any organization or individual may become a member of ARIN by completing a Membership Application Form and paying an annual membership fee.

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