AMERICAN REGISTRY FOR INTERNET NUMBERS LTD

As filed

Subsection

06

Classification

1000

Street

PO BOX 232290

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Mission and programs · 2025

• ESTABLISHED IN DECEMBER 1997, THE AMERICAN REGISTRY FOR INTERNET NUMBERS (ARIN) IS A REGIONAL INTERNET REGISTRY (RIR) INCORPORATED IN THE COMMONWEALTH OF VIRGINIA, USA. ARIN, A NONPROFIT ORGANIZATION, PROVIDES SERVICES RELATED TO THE TECHNICAL COORDINATION AND MANAGEMENT OF INTERNET NUMBER RESOURCES IN ITS RESPECTIVE SERVICE REGION. STAKEHOLDERS IN THE COMMUNITY DRIVE POLICIES AND ACTIVITIES. ARIN PROMOTES THE COMMON BUSINESS INTERESTS OF ITS MEMBERS BY OVERSEEING THE INTERNET PROTOCOL (IP) ADDRESS REGISTRATION PROCESS SO AS TO PROMOTE MORE EFFICIENT USE OF THE INTERNET BY ITS MEMBERS AND OTHER INTERESTED USERS AND THEREBY PROMOTE THE EFFICIENCY OF THE BUSINESS OPERATIONS OF EACH.

• REGISTRATION SERVICES INCLUDES COORDINATION AND MANAGEMENT OF IP ADDRESS SPACE AND ASN ALLOCATIONS AND ASSIGNMENTS, RESOURCE TRANSFERS, RECORD MAINTENANCE, REGISTRATION TRANSACTION INFORMATION (WHOIS), ROUTING INFORMATION (INTERNET ROUTING REGISTRY), AND REVERSE DNS. ARIN ALLOCATES AND ASSIGNS INTERNET NUMBER RESOURCES TO INTERNET SERVICE PROVIDERS AND END USERS WITHIN ITS SERVICE REGION.

• IP NUMBER MANAGEMENT - ARIN IS TASKED WITH THE MANAGEMENT OF IP ADDRESS SPACE, AUTONOMOUS SYSTEM NUMBERS, AND IN-ADDR ARPA ADDRESS MAPPING, AS WELL AS DATABASE MAINTENANCE AND VERIFICATION OF REASSIGNMENT INFORMATION. ARIN ALSO PROMOTES THE CONSERVATION OF INTERNET PROTOCOL RESOURCES AND DISTRIBUTES GLOBALLY UNIQUE INTERNET ADDRESSES IN A HIERARCHICAL MANNER, PERMITTING THE ROUTING SCALABILITY OF ADDRESSES, WHICH IS NECESSARY TO ENSURE PROPER OPERATION OF INTERNET ROUTING.

As filed on the 2025 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2025

As listed in Part VII of the 2025 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

• 2025

  Revenue

  $31,661,623

  Expenses

  $31,941,906

  Contributions

  $118,500

  Grants paid

  $299,221

• 2023

  Revenue

  $28,777,990

  Expenses

  $29,946,085

  Contributions

  $41,803

  Grants paid

  $181,465

• 2022

  Revenue

  $25,380,037

  Expenses

  $26,066,640

  Contributions

  $32,500

  Grants paid

  $134,400

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

• 2021 · 990

  Revenue

  $28,772,051

  Expenses

  $22,683,580

  Assets (EOY)

  $43,598,573

• 2020 · 990

  Revenue

  $23,576,858

  Expenses

  $21,276,175

  Assets (EOY)

  $40,659,396

• 2019 · 990

  Revenue

  $21,084,172

  Expenses

  $21,350,452

  Assets (EOY)

  $42,016,650

• 2018 · 990

  Revenue

  $19,183,719

  Expenses

  $22,035,024

  Assets (EOY)

  $38,865,546

• 2017 · 990

  Revenue

  $17,433,421

  Expenses

  $21,302,955

  Assets (EOY)

  $42,835,995

• 2016 · 990

  Revenue

  $19,760,621

  Expenses

  $21,709,305

  Assets (EOY)

  $42,658,962

• 2015 · 990

  Revenue

  $19,523,896

  Expenses

  $17,798,486

  Assets (EOY)

  $41,898,046

• 2014 · 990

  Revenue

  $18,880,329

  Expenses

  $16,124,843

  Assets (EOY)

  $41,543,990

• 2013 · 990

  Revenue

  $14,973,637

  Expenses

  $15,289,000

  Assets (EOY)

  $38,880,615

• 2012 · 990

  Revenue

  — not reported

  Expenses

  $15,389,595

  Assets (EOY)

  $33,856,570

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

• 20C LLC

  $20,000

  2025 · OPERATIONAL SUPPORT

• Network Time Foundation Inc

  $20,000

  2023 · OPERATIONAL SUPPORT

• FullCtl LLC

  $20,000

  2023 · OPERATIONAL SUPPORT

• Network Time Foundation Inc

  $20,000

  2022 · OPERATIONAL SUPPORT

• UNIVERSITY CORPORATION FOR ADVANCED INTERNET DEVELOPMENT

  $16,000

  2025 · OPERATIONAL SUPPORT

• NETWORK TIME FOUNDATION INC

  $14,000

  2025 · OPERATIONAL SUPPORT

• ORAC INC

  $7,500

  2022 · OPERATIONAL SUPPORT

• University Corporation for Advanced Internet Devel

  $7,000

  2023 · OPERATIONAL SUPPORT

• Organization of American States

  $6,000

  2022 · OPERATIONAL SUPPORT

Where these grants went next →

Grants received

No itemized grant names this organization as a recipient. Only grants over $5,000 are itemized, and only by filers of the full Form 990.

Other IRS files