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How United States ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
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 | 24,540 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 644 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.6M | 1,305 |
| 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.
32,187 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 | 3,885 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.8M | 2,002 |
| AS701US | UUNET - Verizon Business | 43.6M | 993 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,362 |
| 256 |
| — |
| 1 |
| AS33311US | NET-TOPCON - TOPCON POSITIONING SYSTEMS INC | 256 | — | 1 |
| AS402566US | MODERN-CONNECTIVITY - Modern | 256 | 4.1K | 2 |
| AS394206US | DHLC-AS - Deborah Heart and Lung Center | 256 | — | 1 |
| AS36077US | MEMC-1 - Mitchell Electric Membership Corporation | 256 | 1 | 2 |
| AS396400US | OLATHE-KS - City of Olathe | 256 | — | 1 |
| AS17219US | WINGS-NET-2025 - Wings Financial Credit Union | 256 | — | 1 |
| AS399818US | LAER-AS-DEN1 - UnitedLayer, LLC | 256 | 1 | 2 |
| AS393473US | BURRIS-LOGISTICS - Burris Logistics | 256 | — | 1 |
| AS33466US | FLVS-AS - Florida Virtual School | 256 | — | 1 |
| AS395614US | COL - City of Lansing | 256 | — | 1 |
| AS397978US | AS-S3RDVL - SOUTH 3RD VENTURES, LLC | 256 | 65.5K | 2 |
| AS62965US | SAFECU-AS - SAFE CREDIT UNION | 256 | — | 1 |
| AS11913US | ELEVATE-HOMESCRIPTIONS-01 - Elevate Homescriptions | 256 | 16 | 2 |
| AS397871US | COD-PUBLIC-148 - City Of Detroit | 256 | — | 1 |
| AS401509US | BAYHEALTH-MEDICAL-CENTER-INC - Bayhealth Medical Center, Inc. | 256 | — | 1 |
| AS400095US | CLOUDFLARENET - Cloudflare, Inc. | 256 | 1 | 2 |
| AS14983US | LSAC-AS - Law School Admission Council | 256 | — | 1 |
| AS401899US | BAER-CONSULTING-2 - Baer Consulting, Incorporated | 256 | — | 1 |
| AS11726US | WBGAMES - WB Games Inc. | 256 | — | 1 |
| AS62548US | NORWICH-PUBLIC-UTILITIES - City of Norwich Department of Public Utilities | 256 | — | 1 |
| AS213124US | zylinktech-net zylinktech LLC | 256 | 86K | 9 |
| AS26064US | COFKM - City of Kings Mountain | 256 | — | 1 |
| AS27514US | KCML - Kingdon Capital Management, LLC | 256 | — | 1 |
| AS13509US | AS-SNCH-1 - Mount Sinai South Nassau | 256 | — | 1 |
| AS394438US | CITY-OF-PRINEVILLE - City of Prineville | 256 | — | 1 |
| AS398058US | ECCC-EDU - East Central Community College | 256 | — | 1 |
| AS398922US | JDSL-ASN - Jubilee Data Systems, LLC | 256 | 1 | 2 |
| AS29869US | DOTBLOCK-3 - HostRocket.com, Inc. | 256 | 256 | 2 |
| AS400559US | BOSTON-BROADBAND - Boston Broadband | 256 | — | 1 |
| AS19455US | NORTH-KANSAS-CITY-SCHOOLS - North Kansas City Schools | 256 | — | 1 |
| AS55152US | IFCJAS-01 - The Fellowship | 256 | — | 1 |
| AS394387US | VUU - Virginia Union University | 256 | — | 1 |
| AS393482US | SMCISD-ASN - San Marcos Consolidated Independent School District | 256 | — | 1 |
| AS398806US | VIS-2020-01 - Valli Information Systems, Inc | 256 | — | 1 |
| AS396174US | ACML-47-ASN1 - Advent Capital Management, LLC | 256 | — | 1 |
| AS397856US | MEMORIAL-HOSPITAL-HEALTH-CARE-CENTER - Memorial Hospital and Health Care Center | 256 | — | 1 |
| AS398195US | BARSTOOL-SPORTS - Barstool Sports, Inc. | 256 | — | 1 |
| AS398365US | NHAEXTNET - Neil Hoosier & Associates, Inc. | 256 | — | 1 |
| AS14923US | AS-GTS-OK-01 - Graham Technology Solutions LLC | 256 | 256 | 2 |
| AS397141US | VIS-LLC-SC - VIS LLC | 256 | — | 1 |
| AS26520US | HLITSERVICES - HLITSERVICES LLC | 256 | 4.1K | 2 |
| AS399815US | LAER-AS-SYD1 - UnitedLayer, LLC | 256 | 1 | 2 |
| AS398246US | RCC-ASN-01 - Rogue Community College | 256 | — | 1 |
| AS26987US | COAHOMACC - Coahoma Community College | 256 | — | 1 |
| AS400726US | AIRHAWK-WIRELESS - Airhawk Wireless | 256 | — | 1 |
| AS398856US | WPP-DETROIT - Group M Worldwide, LLC | 256 | — | 1 |