Managing Resource Records

API Keys

An Application Programming Interface (API) Key is a shared secret that can be used to identify yourself in your interactions with ARIN. When submitting calls into ARIN’s RESTful Provisioning system, and for some other transactions, you will need an API key. Learn how to create, manage and use your API keys to authenticate your transactions.

Report Reassignments and Reallocations

Organizations that receive IPv4 or IPv6 address space allocations from ARIN directly or as a downstream customer of another organization must provide reassignment/reallocation information via either Referral Whois (RWhois), the Shared Whois Project (SWIP), or a distributed service in compliance with ARIN policy.

Resource Modifications

A Network Modification request is used to change the network name, origin AS, POC handles, and public comments on an IP address block. Changes to reverse DNS delegation cannot be made with a network modification.

ASN Modifications can be done in ARIN Online.

Returning Resources

ARIN welcomes the return of any unused or unneeded resources so they may be added back to our pool of available Internet number resources for issuance to other organizations.

To learn more about returning your resources, visit Understanding the Return and Revocation Process.

Reverse DNS

Reverse DNS is used to determine the domain name that is associated with a given IP address using the Domain Name System (DNS). Reverse resolution is accomplished using pointer (PTR) records that are rooted in the and domains. ARIN requires organizations to maintain their and domain records. You can maintain these records using ARIN Online or ARIN’s Reg-RWS.

Internet Routing Registry (IRR)

ARIN’s Internet Routing Registry (IRR) service allows network operators to submit, maintain, and retrieve router configuration information abstracted from the languages and syntaxes utilized by router configuration software. Internet Routing Registry provides a detailed explanation of how to access and utilize this information to support your organization.

Resource Public Key Infrastructure (RPKI)

RPKI is an opt-in service that allows users to certify their Internet number resources to help secure Internet routing. Internet routing is vulnerable to hijacking and the provisioning/use of certificates is one of the first steps required to make routing more secure. Widespread RPKI adoption will help simplify IP address holder verification and routing decision-making throughout the ARIN region. More information is provided at Resource Certification (RPKI).

Legacy Number Resources

The Legacy Registration Services Agreement (Legacy RSA or LRSA) has been offered to those organizations and individuals in the ARIN service region who hold legacy Internet number resources not covered by any other Registration Services Agreement (RSA) with ARIN. Legacy holders who sign up have been guaranteed the same services provided to other organizations who have a signed RSA with ARIN. Legacy holders will still enjoy this benefit; however, this will be now done by executing a new RSA document that combines the Legacy RSA and the RSA into a single document. This combined RSA document is also now being offered to non-legacy holders.

There is an annual maintenance fee for Legacy holders who sign the combined RSA. The annual invoice will be sent to the designated billing Point of Contact (POC) approximately 60 days before it is due.

If you have questions, please visit the Legacy Resource Holder FAQ section of the Registration Services Agreement FAQ or Legacy Resource Services.

Registration Services Help Desk
7:00 AM to 7:00 PM ET
Phone: +1.703.227.0660
Fax: +1.703.997.8844

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