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How United States ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to United States over time.
The largest autonomous systems registered to United States by IPv4 footprint.
| AS | Holder | IPv4 | Prefixes |
|---|---|---|---|
| AS749US | DNIC-AS-00749 - United States Department of Defense (DoD) | 227.5M | 3,133 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 218M | 24,543 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 644 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.6M | 1,304 |
| AS721US | DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) |
United States against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.
Share of announced address space covered by valid Route Origin Authorizations.
32,174 autonomous systems registered to United States. Click an AS for detail.
| 73.1M |
| 232 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 437 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 51.5M | 3,884 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.8M | 1,999 |
| AS701US | UUNET - Verizon Business | 43.6M | 993 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,345 |
| 256 |
| — |
| 1 |
| AS22336US | PELLA - Pella Corporation | 256 | 1 | 2 |
| AS396911US | DPLO-411SSFLT - Diplomat Pharmacy, Inc | 256 | — | 1 |
| AS17197US | DAEDELUS - The Daedelus Group | 256 | 1 | 2 |
| AS29931US | ACE-002 - Ace Data Centers II, L.L.C. | 256 | — | 1 |
| AS18513US | MCSD-NET-01 - Muscogee County School District | 256 | — | 1 |
| AS33382US | CRYPTICSTUDIOS-HQ - CRYPTIC STUDIOS, INC. | 256 | — | 1 |
| AS399293US | HOLASN - Hollingsworth Logistics Group LLC | 256 | — | 1 |
| AS27487US | FHLBNY-AS - FEDERAL HOME LOAN BANK OF NY | 256 | — | 1 |
| AS402467US | READYMAG - Readymag | 256 | — | 1 |
| AS396343US | PRTNET - Blurb, Inc. | 256 | — | 1 |
| AS402500US | GCL-01 - Gecko | 256 | 256 | 2 |
| AS394160US | DRARS - Advanced Radiology Services, P.C. | 256 | — | 1 |
| AS394824US | CBU - Christian Brothers University | 256 | — | 1 |
| AS400142US | FREE-RANGE-INTERNET - Free Range Internet LLC | 256 | — | 1 |
| AS394702US | MGE - MADISON GAS AND ELECTRIC FOUNDATION, INC. | 256 | — | 1 |
| AS31774US | TACONIC-CAPITAL-ADVISORS - Taconic Capital Advisors L.P. | 256 | — | 1 |
| AS399716US | ISHIP-CORP - ISHIP, INC. | 256 | — | 1 |
| AS402485US | AMCONSULTING - Adam | 256 | 16 | 2 |
| AS40777US | TRI-DELTA - Tri-Delta Resources, Corp. | 256 | — | 1 |
| AS11174US | AS-ATHEN-1 - Athenahealth | 256 | — | 1 |
| AS46848US | VOTACALL-ONE - Votacall Inc. | 256 | — | 1 |
| AS400657US | DACOMM - DACOMM Inc. | 256 | — | 1 |
| AS10248US | BLUE-RIDGE-BANKSHARES-ASN - Blue Ridge Bankshares, Inc. | 256 | — | 1 |
| AS402026US | AVIRM-SYSTEMS-INC - Avirm Systems, Inc. | 256 | — | 1 |
| AS11347US | ORC-F2 - ORC | 256 | — | 1 |
| AS27344US | READING-HOSPITAL - Reading Hospital | 256 | — | 1 |
| AS399022US | ALLEGIANCE-01 - ALLEGIANCE BENEFIT PLAN MANAGEMENT, INC | 256 | — | 1 |
| AS401675US | EAI-ASN - Empire AI | 256 | 256 | 2 |
| AS401642US | CARVERAUTO - Carver Automation Corporation | 256 | 1 | 2 |
| AS398403US | SSI - Alarm Detection Systems, Inc | 256 | — | 1 |
| AS54669US | LARIMER-ASN - Larimer County Government | 256 | — | 1 |
| AS394878US | OLDREPUBLICTITLEASOP2 - OLD REPUBLIC NATIONAL TITLE INSURANCE CO. | 256 | — | 1 |
| AS22613US | GWU-055 - UNIVERSAL HEALTH SERVICES | 256 | — | 1 |
| AS398028US | PSFC-NYC - Park Slope Food Coop Inc | 256 | — | 1 |
| AS398376US | SEPHORA-USA - Sephora USA Inc. | 256 | — | 1 |
| AS10257US | TANGOE-PROD-1 - Tangoe US, Inc. | 256 | — | 1 |
| AS62815US | LAER-AS-CAM1 - UnitedLayer, LLC | 256 | 1 | 2 |
| AS25825US | PVH-ASN-1 - Poudre Valley Health Care, Inc. | 256 | — | 1 |
| AS393717US | PUPPET - Puppet, Inc. | 256 | 1 | 2 |
| AS36127US | MCPS - Miller Canfield | 256 | 1 | 2 |
| AS53514US | UHQ - UHQ Services LLC | 256 | 1 | 2 |
| AS19302US | USCC-DC - US Chamber of Commerce | 256 | — | 1 |
| AS398093US | ADA-TECH-LLC - ADA Tech, LLC | 256 | — | 1 |
| AS27189US | MARTEN-TRANSPORT-LTD - Marten Transport, Ltd. | 256 | — | 1 |
| AS402074US | SOFTIRON-ASN-RIC - SoftIron | 256 | 1 | 2 |
| AS55018US | PRIME - Prime Holdings Insurance Services Inc | 256 | — | 1 |