American Registry for Internet Numbers
American Registry for Internet Numbers (ARIN) is a nonprofit, member-based Regional Internet Registry founded in 1997 that allocates and registers IP addresses and Autonomous System Numbers across the United States, Canada, and the Caribbean, funded by annual registration and transfer fees.
- Company typePrivate
- Founded1997
- HeadquartersBaltimore, United States
- Headcount101–250
- GTM typeB2B
- OfferingServices
What American Registry for Internet Numbers does
American Registry for Internet Numbers (ARIN) is a nonprofit, member-based organization founded in 1997 that operates as the Regional Internet Registry (RIR) for the United States, Canada, the Caribbean, and parts of the North Atlantic. ARIN administers the allocation and registration of unique Internet number resources — specifically IPv4 addresses, IPv6 addresses, and Autonomous System Numbers (ASNs) — and maintains the authoritative registry data relied upon for global Internet routing. Its governance is bottom-up and consensus-driven, executed through member meetings, an Advisory Council, a Board of Trustees, and an open Policy Development Process.
The organization's core technical platform is ARIN Online, a self-service portal for resource management, complemented by public data access via the Registration Data Access Protocol (RDAP, defined in RFC STD 95) and legacy Whois. Routing security services include Resource Public Key Infrastructure (RPKI) for cryptographic route validation, an Internet Routing Registry (IRR) for routing policy data, DNSSEC for DNS authentication, and Reverse DNS services. The Reg-RWS API supports automated registry record management, and an Operational Test and Evaluation (OT&E) sandbox environment enables safe integration testing.
ARIN funds operations primarily through annual registration fees tiered by resource allocation size, supplemented by application fees for new resource requests and transfer processing fees. A Premier Support Plan (PSP) offers additional support. The free pool of IPv4 address space was depleted on 24 September 2015, after which IPv4 resources are only available through the transfer market. Customer segments include ISPs, telecom carriers, large enterprises, and government and educational institutions across the region. Distribution is direct via the self-service portal and Registration Services Help Desk; engagement is sustained through public policy meetings, a fellowship program, instructional webinars, and a community grant program. The organization employs between 101 and 250 people and is led by founder John Curran (President and CEO) with Richard Jimmerson as Chief Operating Officer.
American Registry for Internet Numbers firmographics
Firmographics- Name
- American Registry for Internet Numbers
- Legal name
- American Registry for Internet Numbers, Ltd.
- Website
- https://arin.net
- Company type
- Private
- Founded year
- 1997
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- American Registry for Internet Numbers (ARIN) is a nonprofit, member-based Regional Internet Registry founded in 1997 that allocates and registers IP addresses and Autonomous System Numbers across the United States, Canada, and the Caribbean, funded by annual registration and transfer fees.
- Ownership category
- akta.pro rank
Where American Registry for Internet Numbers is headquartered
LocationHeadquarters
- HQ city
- Baltimore
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
American Registry for Internet Numbers business model
Business model- GTM type
- B2B
- Offering type
- Services
Revenue model
- Annual Fees for Number Resources: ARIN charges annual fees based on the number and type of Internet number resources (IPv4, IPv6, ASNs) held by organizations. Fee schedule includes different tiers based on resource allocation size. The organization also charges application fees for new resource requests and transfer processing fees.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Annual | Tiered annual fees based on number resource holdings |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels5 records
American Registry for Internet Numbers product offering
Product offeringCore offering
ARIN is the Regional Internet Registry (RIR) for the United States, Canada, Caribbean, and parts of the North Atlantic. It allocates and registers Internet number resources, including IPv4 addresses, IPv6 addresses, and Autonomous System Numbers (ASNs), and provides supporting registry and routing security services (RPKI, IRR, DNSSEC, RDAP/Whois) to network operators and organizations in its region.
Product overview
ARIN is a nonprofit, member-based organization that operates as the Regional Internet Registry (RIR) for the United States, Canada, and several Caribbean and North Atlantic regions. The organization offers a unified registry platform centered on ARIN Online for managing IP addresses (IPv4/IPv6) and Autonomous System Numbers (ASNs). Core services include Routing Security (RPKI, IRR, DNSSEC, Reverse DNS), Whois/RDAP lookup services, and a Policy Development Process. Supporting offerings encompass training/education, the Fellowship Program, Community Grant Program, and developer tools such as the Reg-RWS API and OT&E testing environment. The portfolio functions as an integrated registry ecosystem rather than discrete modules.
Differentiator
Problem solved
Functional benefit
Products and services
- ARIN Online
- IP Address & ASN Management
- Routing Security Services
- Whois/RDAP Service
- Reg-RWS (Registry Web Service) Web service enabling automated management of resource records in the ARIN registry.
Companies that use American Registry for Internet Numbers
Customer profileSegments3 records
American Registry for Internet Numbers technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
American Registry for Internet Numbers partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Number Resource Organization (NRO)coreARIN is a member of the Number Resource Organization, which is a coordination body for the five Regional Internet Registries (RIRs) worldwide. The NRO coordinates global IP address allocation and Internet number resource policy.
Scale indicators3 records
Recent moves5 records
Expansion highlights4 records
American Registry for Internet Numbers competitors and assessment
Company assessmentDirect peers
- Identity Digital: Identity Digital operates multiple new gTLD registries and provides registry backend services. While focused on domain names rather than IP numbers, it is comparable as a registry operator with similar data and registration management functions.
- Public Interest Registry (PIR): PIR operates the .org registry and was originally a nonprofit operating under a similar model to ARIN. It is comparable as a registry operator with a nonprofit governance structure.
- APNIC: APNIC is the Regional Internet Registry for the Asia-Pacific region. Like ARIN, it allocates IP addresses and ASNs, maintains a public registry, and provides routing security services to operators in its service region.
- RIPE NCC: RIPE NCC is the Regional Internet Registry for Europe, the Middle East, and parts of Central Asia. It performs the same allocation, registry, and routing security functions as ARIN in its respective service region.
- AFRINIC: AFRINIC is the Regional Internet Registry for Africa. It performs the same allocation and registry functions as ARIN, and the five RIRs coordinate policy through the Number Resource Organization alongside ARIN.
- LACNIC: LACNIC is the Regional Internet Registry for Latin America and the Caribbean. It is a direct peer of ARIN with an overlapping service region (Caribbean) and similar member-based, nonprofit structure.
Others
- Internet Society (ISOC): ISOC is a nonprofit organization that promotes the open development and evolution of the Internet. It is comparable to ARIN as a community-driven, nonprofit Internet governance organization working alongside the RIR ecosystem.
- IETF: The IETF develops the technical standards (including RDAP, RFC STD 95) that ARIN's registry services implement. It is adjacent to ARIN as the standards body whose protocols underpin registry operations.
Broad incumbents
- ICANN: ICANN coordinates the global domain name system and allocates unique identifiers at the root level. While it focuses on DNS rather than IP allocation, it is the closest coordinating body for the system ARIN operates within.
- VeriSign: VeriSign operates the authoritative registry for .com and .net and provides critical Internet infrastructure services. While focused on domain names rather than IP addresses, it is comparable as a registry operator with similar utility-like economics.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
American Registry for Internet Numbers social profiles
Digital presenceAmerican Registry for Internet Numbers financial estimates
Financial estimateRevenue estimate
Valuation estimate
American Registry for Internet Numbers leadership team
Management profileNumber of profiles
American Registry for Internet Numbers funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
American Registry for Internet Numbers M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about American Registry for Internet Numbers
What does American Registry for Internet Numbers do?
ARIN is the Regional Internet Registry (RIR) for the United States, Canada, Caribbean, and parts of the North Atlantic. It allocates and registers Internet number resources, including IPv4 addresses, IPv6 addresses, and Autonomous System Numbers (ASNs), and provides supporting registry and routing security services (RPKI, IRR, DNSSEC, RDAP/Whois) to network operators and organizations in its region.
Is American Registry for Internet Numbers a public or private company?
American Registry for Internet Numbers is a private company. It is currently operating.
When was American Registry for Internet Numbers founded?
American Registry for Internet Numbers was founded in 1997. It employs 101 to 250 people.
Where is American Registry for Internet Numbers based?
American Registry for Internet Numbers is headquartered in Baltimore, United States, in the North America region.
How does American Registry for Internet Numbers make money?
One revenue line is on record: annual Fees for Number Resources.
Who are American Registry for Internet Numbers's main competitors?
Direct peers on record are Identity Digital, Public Interest Registry (PIR), APNIC, RIPE NCC, AFRINIC and LACNIC. Others are Internet Society (ISOC) and IETF. Broad incumbents are ICANN and VeriSign.
Does American Registry for Internet Numbers have an API?
Yes. ARIN provides Registration Data Access Protocol (RDAP), a REST-style HTTP protocol defined by RFC STD 95 for querying Internet resource registration data. RDAP delivers JSON-formatted responses over HTTPS and serves as an alternative to the legacy Whois protocol. The service includes query URLs for IP networks, Autonomous System Numbers, domains, entities, and nameservers. A bootstrap server is available to help clients find authoritative servers for queries. The ARIN bootstrap server is open source and available on GitHub. Developer documentation is at www.arin.net/resources/registry/whois/rdap.