IP addresses are owned and managed by a layered system of global organizations, regional registries, internet service providers, and large technology companies. ICANN reappointed Tripti Sinha as Board Chair in late 2025, continuing the organization’s oversight of IP address coordination worldwide.
- A total of 3.41 billion IPv4 addresses were allocated worldwide as of 2025, according to IP2Location.
- The United States holds 1.23 billion IPv4 addresses, accounting for 36.1% of the global total.
- The IPv4 address transfer market reached $1.2 billion in annual transaction volume in 2025.
- Global IPv6 adoption reached approximately 45–50% as of early 2026.
- Five Regional Internet Registries manage IP allocation across every geographic zone on Earth.
How IP Addresses Got Their Name
The term “IP address” comes from the Internet Protocol, a set of rules Vint Cerf and Bob Kahn designed in the 1970s to route data across ARPANET. IPv4, formalized in 1981 through RFC 791, introduced the four-number format (e.g., 192.168.1.1) using 32 bits — roughly 4.3 billion possible addresses.
IPv6 arrived in 1998 with a 128-bit format and 340 undecillion possible addresses. The name stayed the same because the function didn’t change: every device still needs a unique numerical identifier to send and receive data.
Who Owns IP Addresses
No single entity owns all IP addresses. The Internet Assigned Numbers Authority (IANA), operating under ICANN, distributes large blocks to five Regional Internet Registries. Those registries allocate smaller blocks to ISPs and organizations.
ISPs like Comcast, AT&T, and Verizon receive address blocks and assign individual IPs to customers. Large tech firms such as Amazon, Google, and Microsoft hold massive IP ranges for cloud services and internal infrastructure.
The Origin of IP Address Management and Its Early Years
Jon Postel, a computer scientist at USC’s Information Sciences Institute, managed number assignments for the early internet starting in the 1970s. He ran what was informally called IANA from his office, tracking protocol parameters and allocations by hand.
The U.S. government created InterNIC in 1993 to handle domain registration and IP allocation. ICANN was established in 1998, taking over IANA’s functions. The five RIRs — ARIN, RIPE NCC, APNIC, LACNIC, and AFRINIC — were set up between 1992 and 2005 to distribute addresses regionally.
Largest Holders of IP Addresses
United States
- Holds 1.23 billion IPv4 addresses
- 36.1% of all global allocations
- Home to AWS, Google Cloud, and Azure data centers
China
- Holds 351 million IPv4 addresses
- Second-largest national holder
- Allocations managed through APNIC
Japan
- Holds 199 million IPv4 addresses
- Third-largest national holder
- Early internet adoption drove high allocation
Amazon (AWS)
- Largest corporate holder of IPv4 addresses
- Over 100 million addresses across cloud regions
- Acquires blocks through the transfer market
Comcast
- Largest U.S. residential ISP by subscriber count
- Manages millions of IPs for Xfinity customers
- Allocated through ARIN
U.S. Department of Defense
- Received some of the earliest IPv4 blocks
- Holds multiple legacy /8 allocations
- Returned some unused blocks to ARIN in 2021
Who Governs IP Address Allocation
ICANN Board Leadership
Tripti Sinha — Board Chair (reappointed 2025)
President and CEO of Internet2. Over 30 years in internet infrastructure. First appointed to the ICANN Board in 2018.
Sajid Rahman — Board Vice Chair (appointed 2025)
Managing partner of a late-stage technology fund. Former Managing Director at Standard Chartered Bank. Joined the Board in 2022.
Kurt Erik Lindqvist — President and CEO (since December 2024)
Former CEO of the London Internet Exchange (LINX). Took over ICANN’s executive leadership from Sally Costerton.
Regional Internet Registry Directors
ARIN — John Curran, President and CEO
Manages IP allocation for the United States, Canada, and parts of the Caribbean. Founded in 1997.
RIPE NCC — Hans Petter Holen, Managing Director
Covers Europe, the Middle East, and Central Asia. The first RIR, established in 1992.
APNIC — Paul Wilson, Director General
Handles the Asia-Pacific region. Founded in 1993, allocates addresses to 56 economies.
LACNIC — Oscar Robles-Garay, CEO
Manages Latin America and Caribbean allocations. Founded in 2002, based in Montevideo.
AFRINIC — Eddy Kayihura, CEO
Covers the African continent. The youngest RIR, established in 2005 in Mauritius.
Board Members with Policy and Technical Expertise
Constance Bommelaer de Leusse — Board Member (2025–2028)
Served on the World Economic Forum’s Internet for All Steering Committee. Holds degrees from Paris-Panthéon-Assas University and the London School of Economics.
Raúl Echeberría — Board Member (2025–2028)
Executive Director of ALAI (Latin American Internet Association). Co-founded LACNIC and served as its CEO for 12 years.
León Sánchez — Board Member
Intellectual property attorney at Fulton & Fulton in Mexico City. Completed Internet Law studies at Harvard Law School.
IP Address Governance Mission
ICANN’s stated mission is to ensure a stable, secure, and unified global internet. In practice, this means coordinating the assignment of unique identifiers — domain names, IP addresses, and protocol parameters — so that every device on the internet can find every other device without conflict.
The IANA 2030 Strategic Plan outlines goals including improved DNS root server governance and better systems tooling. Each RIR also runs its own policy process through open, community-driven meetings where ISPs, network operators, and other stakeholders propose and debate allocation rules through a bottom-up, consensus model.
IP Address Products and Services
WHOIS Lookup
- Query protocol for IP registration data
- Returns organization name and contact info
- Available through whois.domaintools.com and similar tools
IP Geolocation Services
- Maps IP addresses to physical locations
- Providers include IP2Location, ipinfo.io, and MaxMind
- Used for ad targeting, fraud detection, and compliance
IPv4 Address Leasing
- Organizations rent unused IPv4 blocks
- Average lease prices declined about 15% in 2025
- Managed by brokers like IPv4.Global and Hilco Streambank
IPv4 Transfer Market
- Buying and selling of IPv4 address blocks
- $1.2 billion in annual transaction volume in 2025
- Average sale prices dropped roughly 50% over 2025
Reverse IP Lookup
- Shows all domains hosted on a single IP
- Tools include viewdns.info and yougetsignal.com
- Useful for security research and server auditing
Dedicated IP Addresses
- Available through VPN providers and hosting companies
- Gives a single user exclusive use of one IP
- Common for SSL certificates, email servers, and gaming
Companies like Apple and Google also maintain large pools of dedicated IPs for cloud services and content delivery.
FAQs
What is the net worth of IP addresses?
The IPv4 transfer market recorded $1.2 billion in annual transaction volume in 2025. Average sale prices dropped about 50% over that year. IPv6 addresses are allocated free by RIRs.
Who owns IP addresses?
IANA, operating under ICANN, distributes IP address blocks to five Regional Internet Registries. These registries allocate addresses to ISPs and organizations. No single entity owns the entire IP address space.
Is ICANN an American organization?
ICANN is headquartered in Los Angeles and was incorporated in California in 1998. It transitioned out of U.S. government oversight on October 1, 2016, and operates as an independent, globally governed nonprofit.
When did IP address management begin?
Jon Postel began managing internet number assignments in the 1970s at USC. IANA was formalized in the 1980s, InterNIC launched in 1993, and ICANN took over global coordination in 1998.
What is the IP address market cap in 2026?
There is no single “market cap” for IP addresses. Total allocated IPv4 space reached 3.41 billion addresses in 2025. The transfer market processed $1.2 billion in transactions during 2025.
