Current Fee Schedule FAQ

Determining Your Fees

How do I determine my fees if my organization has multiple resources under one Org ID?

ARIN Online features a fee estimator for ARIN resource holders wishing to view an estimate of annual fees.

How are my fees determined?

ARIN determines fees per Org ID. Fees are determined by the service category corresponding to the cumulative size of IPv4 or IPv6 address space or number of Autonomous System Numbers (ASNs). If an organization holds IPv4 and/or IPv6 resources and ASNs, the fee is based on the larger dollar value.

Invoices contain a description of the resources that your organization’s fees are based on using a base count of /24s for IPv4 and /48s for IPv6 as well as the number of ASNs. The table below shows how those equivalents match up with the fee categories as described within the Fee Schedule.

Service Category	Fee	IPv4 Aggregate Block Size	IPv6 Aggregate Block Size	Autonomous System Numbers (ASNs)
3X-Small*	$262.50	/24 or smaller	/40 or smaller	1-3 ASNs
2X-Small	$525	Larger than /24, up to and including /22	Larger than /40, up to and including /36	4-15 ASNs
X-Small	$1,050	Larger than /22, up to and including /20	Larger than /36, up to and including /32	16-63 ASNs
Small	$2,100	Larger than /20, up to and including /18	Larger than /32, up to and including /28	64-255 ASNs
Medium	$4,200	Larger than /18, up to and including /16	Larger than /28, up to and including /24	256+ ASNs
Large	$8,400	Larger than /16, up to and including /14	Larger than /24, up to and including /20
X-Large	$16,800	Larger than /14, up to and including /12	Larger than /20, up to and including /16
2X-Large	$33,600	Larger than /12, up to and including /10	Larger than /16, up to and including /12
3X-Large	$67,200	Larger than /10, up to and including /8	Larger than /12, up to and including /8
4X-Large	$134,400	Larger than /8, up to and including /6	Larger than /8, up to and including /4
5X-Large	$268,800	Larger than /6	Larger than /4

What do you mean by “cumulative total?”

The current fee schedule is based on the service category corresponding to the total amount of ARIN allocated Internet number resources (IPv4, IPv6, and ASNs) to an organization, covered under an ARIN Registration Services Agreement (RSA). For example, if an organization has both a /32 of IPv6 address space (X-small service category) and a /17 of IPv4 address space (medium service category), that organization will be in the medium service category as this is the larger of the two and invoiced accordingly. For another example, if you have a /20 and a /21 issued by ARIN under RSA, and a /18 of legacy address space that is not covered under any agreement, your annual fees are calculated solely on the space under an RSA and falls under the small Service Category of the fee schedule.

Understanding Your Invoice

Resource Holdings Detail

To assist customers with the management of their resources, invoices now contain cumulative totals of held IP resources using the baselines of /24s for IPv4 and /48s for IPv6, as well as total number of Autonomous System Numbers (ASNs).

Legacy RSA Changes

Invoices now show what a Legacy Resource holder organization’s fee would be without the Legacy RSA Fee Cap, and then what their annual fee is with the fee cap. Example included below.

Billing

Where do I find more information on the billing process?

Information about how billing works and the resource revocation, returns, and reinstatement process is available on the ARIN website.

How do I determine the term dates of my annual invoice?

The term of coverage is one year, renewing annually on the last day of each organization’s anniversary month. For example, for an invoice due 30 June 2025, the period of coverage would be 30 June 2025 - 29 June 2026.

Can I pay the renewal fees for multiple years?

No, the annual fee may fluctuate from year to year, as it is subject to an annual increase as approved by the Board of Trustees of no greater than 5%. Each year, the annual invoice is calculated by the cumulative total of ARIN-issued resources (IPv4, IPv6, ASNs) under contract.

Is each resource held under a single Org ID billed under a separate invoice?

No, ARIN generates a single invoice per Org ID. If an organization holds multiple resources (ASN, IPv4, and/or IPv6), the invoice details the resource type, quantities, and amount for the annual fee.

Managing Your Fees

If I am an ISP, can I return my IPv6 /32 for a /48 to lower my annual fees?

This is not possible under the current policy “Initial Allocation to LIRs,” NRPM 6.5.2.1.b, as it states that the smallest block an ISP may be allocated is a /36 or /40. Partial returns of any IPv6 allocation that results in less than a /36 of holding are not permitted (NRPM 6.5.2.1.g). So the smallest block your organization can reduce to at this time is a /36, which is in the 2X-Small category.

How can I tell if returning IPv6 addresses (or a portion) will reduce my fees?

You will need to look at the Fee Schedule in the Service Category for both IPv4 and IPv6 to determine if returning IPv6 addresses will reduce your fees. Per the current fee schedule, ARIN calculates annual fees based on the larger of your IP address holdings.

For example, if your cumulative (total) IPv4 allocations are greater than a /22 IPv4 allocation (2X-Small) and you have a /32 IPv6 allocation (X-Small), your corresponding Service Category is X-Small, the larger of the two service categories. Returning your /32 for a /36 would reduce your IPv6 Service Category to “2X-Small,” and you will be invoiced according to the fees associated with the 2X-Small Service Category.

How does the IPv6 Fee Waiver work?

The temporary IPv6 Fee Waiver allows organizations that are currently in the 3X-Small category based on their IPv4 allocation to be billed the 3x-Small fee after receiving a /36 (2x-Small) allocation of IPv6. This waiver will expire on 31 December 2026. Beginning in January 2027, all organizations will be billed based on their size category in the RSP Fee table.