ARIN 2025 Annual Report

American Registry for Internet Numbers

https://www.arin.net/about/corporate/annual/reports/2025_annualreport.pdf

Reporters: John Curran (President & CEO); Nancy E. Carter (Chair, Board of Trustees); ARIN Board and staff

Overview and Mission

The American Registry for Internet Numbers (ARIN) continued its role as a Regional Internet Registry (RIR), managing IP address space (IPv4, IPv6) and Autonomous System Numbers (ASNs) across the United States, Canada, the Caribbean, and North Atlantic regions.

ARIN serves approximately 40,000 organizations and maintains ~8 million registration records, supporting Internet stability through:

• Resource allocation and registration services

• Technical infrastructure (RDAP, IRR, RPKI)

• Community-driven policy development

Leadership Message and Strategic Direction

John Curran and Nancy Carter frame 2025 as a year of technical modernization and strengthened governance.

Strategic priorities were organized around four pillars:

• Global leadership

• Governance and organizational resilience

• Member experience and advocacy

• Operational and technical excellence

Key technical and operational developments:

• Migration to TLS 1.2/1.3-only security standards

• Retirement of legacy services (FTP, OriginAS field)

• Completion of a multi-year data center relocation

• Enhancements to RPKI, including IRR Auto-Manager and ROA Change Log

2025 Highlights

Major milestones across the year included:

• Launch of ARIN Academy (e-learning platform for IPv6, RPKI, ARIN tools)

• Introduction of ARIN Deep Dive technical workshops

• Two rounds of ICP-2 global consultations on RIR governance

• Continued ARIN on the Road outreach events across the region

• Finalization of data center migration and infrastructure upgrades

Membership

ARIN membership structure includes Service Members (resource holders) and optional General Members (governance participants).

Key statistics (Dec 31, 2025):

• 25,085 Service Members

• 1,472 General Members

Distribution:

• United States: 23,823

• Canada: 2,347

• Caribbean: 269

• Other: 106

Resource mix:

• IPv4-only: 51.8%

• IPv4 + IPv6: 36.2%

• IPv6-only: 6.5%

Registration Services and Resource Activity

ARIN processed substantial demand for Internet number resources:

• 1,922 IPv4 requests

• 1,339 IPv6 requests

• 1,555 ASN requests

IPv6 allocations were concentrated in:

• United States (941)

• Canada (64)

• Caribbean (11)

Transfer activity remained significant:

• 540 transfers due to M&A

• 1,795 intra-region transfers

• Extensive inter-RIR transfers, especially with LACNIC, RIPE NCC, and APNIC

Routing Security (RPKI)

Routing security remained a central focus:

• 8,140 organizations enrolled in RPKI

• 98% using hosted RPKI services

Key developments:

• Continued growth in RPKI adoption (1,839 new registrations in 2025)

• Introduction of ASPA support in testing

• Launch of training via ARIN Academy and Deep Dive workshops

Governance and Board Activity

The Board of Trustees (10 members) maintained oversight of strategy, finance, and policy ratification.

Strategic objectives included:

• Advancing routing security

• Strengthening multistakeholder governance

• Improving service delivery

• Expanding Caribbean outreach

Elections (2025):

• Lee Howard elected; incumbents Hank Kilmer and Robert Seastrom reelected

• Advisory Council and NRO NC seats filled with new and returning members

Policy Development

Policy development remained open and community-driven:

• 10 policy proposals received

• 1 policy implemented (2025-2)

• 5 policies under discussion

• 4 policies abandoned

The Number Resource Policy Manual (NRPM 2025.1) incorporated updates related to:

• Whois data requirements

• Direct assignment language

• Community network carveouts

Community Programs

ARIN continued investment in capacity building:

Fellowship Program

• ARIN 55: 16 fellows (Canada, Caribbean, U.S.)

• ARIN 56: 17 fellows

Community Grant Program

• Funded projects on:

  • NTP documentation tooling

  • IPv6 testing infrastructure

  • RDAP visualization tools

Meetings: ARIN 55 and ARIN 56

ARIN 55 (Charlotte, April 2025)

• Included RPKI Deployathon and keynote by Leslie Daigle

• Extensive discussion of IPv4/IPv6 policy reforms

ARIN 56 (Arlington, October 2025)

• Focus on governance, elections, and policy refinement

• Strong hybrid participation and community Q&A

Both meetings reinforced ARIN’s participatory policy model.

Government and Global Engagement

ARIN expanded engagement with governments and international bodies:

• Contributions to ITU discussions on IPv6 deployment

• Participation in WSIS+20 review process

• Launch of Caribbean Diplomatic Forum

• Leadership role in Connected Caribbean Summit

Global Coordination (NRO)

Through the Number Resource Organization (NRO), ARIN collaborated with other RIRs (AFRINIC, APNIC, LACNIC, RIPE NCC):

• Participation in global RPKI initiatives

• Ongoing updates to ICP-2 (RIR governance framework)

• Representation in ICANN’s Address Supporting Organization

Inside ARIN (Operations)

Security and Infrastructure

• SOC 2 and PCI DSS recertification

• Removal of legacy cryptographic and network components

Engineering

• Four major releases

• Continued reduction of technical debt

• Enhanced RPKI and routing tools

Financials

• $31.8M in billings

• 33,200 invoices processed

• Target: balanced budget by 2030

Customer Service

• 6,682 calls

• 1,407 chats

• 5,577 tickets resolved

RESOURCES

• ARIN 2025 Annual Report — full report covering registration services, governance, financials, and community programs

• American Registry for Internet Numbers (ARIN) — Regional Internet Registry for the U.S., Canada, and Caribbean

• ARIN Academy — free e-learning platform covering IPv6, RPKI, and ARIN tools, launched 2025

• Resource Public Key Infrastructure (RPKI) — ARIN’s hosted routing security service, with 8,140 enrolled organizations

• Internet Routing Registry (IRR) — ARIN’s routing policy database, enhanced with IRR Auto-Manager in 2025

• Registration Data Access Protocol (RDAP) — modern replacement for Whois, subject of community grant-funded visualization tools

• Number Resource Organization (NRO) — coordinating body for the five Regional Internet Registries

• ARIN Fellowship Program — supports participation by emerging community members from the U.S., Canada, and Caribbean

• ARIN Community Grant Program — funds projects improving Internet infrastructure and governance in the ARIN region

• Number Resource Policy Manual (NRPM) — community-developed policy framework governing IP address and ASN allocation