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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) | 227.7M | 3,133 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 219M | 23,666 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 645 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.8M | 1,361 |
| AS721US | DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) | 73.1M | 234 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 439 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 51.8M | 3,911 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 45M | 2,046 |
| AS701US | UUNET - Verizon Business | 43.6M | 996 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.8M | 4,491 |
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.
32,363 autonomous systems registered to United States. Click an AS for detail.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS13783US | RADFORD-UNIV-AS - Radford University | 65.8K | — | 2 |
| AS10662US | NORFOLK-SOUTHERN - Norfolk Southern Corporation | 65.8K | — | 2 |
| AS18791US | TCU - Texas Christian University | 65.8K | — | 2 |
| AS10561US | BRANDEIS - Brandeis University | 65.8K | — | 2 |
| AS3446US | KANSAS - State of Kansas | 65.8K | — | 2 |
| AS33281US | BRIGHAM-YOUNG-UNIVERSITY-IDAHO - BRIGHAM YOUNG UNIVERSITY - IDAHO | 65.8K | 1 | 3 |
| AS53695US | SIUE - Southern Illinois University at Edwardsville | 65.8K | — | 13 |
| AS4385US | RIT-ASN - Rochester Institute of Technology | 65.8K | 1 | 3 |
| AS399569US | VU-NET - Vincennes University | 65.8K | — | 2 |
| AS33401US | CPCC - Central Piedmont Community College | 65.8K | — | 2 |
| AS22323US | UNIVERSITY-OF-CALIFORNIA-MERCED - University of California, Merced | 65.8K | — | 2 |
| AS399315US | INDSTATE - Indiana State University | 65.8K | — | 2 |
| AS1358US | HNSNET-AS - Hughes Network Systems, LLC | 65.8K | — | 8 |
| AS13513US | ALFRED-UNIVERSITY - Alfred University | 65.8K | — | 2 |
| AS17152US | BATES - Bates College | 65.8K | 65.5K | 3 |
| AS30679US | CPPNET - California State Polytechnic University - Pomona | 65.8K | 1 | 3 |
| AS10631US | GSU10631 - Georgia State University | 65.8K | — | 2 |
| AS6510US | BYU - Brigham Young University | 65.8K | 256 | 3 |
| AS22198US | LAFAYE - Lafayette College | 65.8K | — | 2 |
| AS3634US | SFASU-AS - Stephen F. Austin State University | 65.8K | 65.5K | 3 |
| AS29899US | GEISINGER - Geisinger System Services | 65.8K | 256 | 3 |
| AS7773US | SD-NET - South Dakota State Government | 65.8K | — | 2 |
| AS323US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 65.8K | 256 | 3 |
| AS1224US | NCSA-AS - University of Illinois | 65.8K | 1 | 3 |
| AS398846US | LOGIS-AS-1 - Local Government Information Systems Association | 65.8K | 65.5K | 3 |
| AS25968US | SELUNET - Southeastern Louisiana University | 65.8K | — | 2 |
| AS11540US | RTI - Research Triangle Institute | 65.8K | 1 | 3 |
| AS1351US | UVM-EDU-AS - University of Vermont | 65.6K | 256 | 3 |
| AS10448US | VILLANOVA-UNIV - Villanova University | 65.5K | — | 1 |
| AS36091US | SCAQMD-ASN - South Coast Air Quality Management District | 65.5K | — | 1 |
| AS25709US | LAMARUNIV - Lamar University | 65.5K | — | 1 |
| AS6056US | COLBY - Colby College | 65.5K | — | 1 |
| AS2903US | MORIC - Madison-Oneida BOCES | 65.5K | — | 1 |
| AS358US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 65.5K | 512 | 3 |
| AS1983US | BERNALILLO - Bernalillo County | 65.5K | — | 1 |
| AS22226US | SFUSD - San Francisco Unified School District | 65.5K | — | 1 |
| AS2936US | NERSC - National Energy Research Scientific Computing Center | 65.5K | 16 | 2 |
| AS13940US | SJCOE - San Joaquin County Office of Education | 65.5K | — | 4 |
| AS22178US | PA-SENATE - Senate of Pennsylvania | 65.5K | — | 1 |
| AS13327US | EKU - Eastern Kentucky University | 65.5K | — | 1 |
| AS19933US | BUFFALOSTATE - Buffalo State College | 65.5K | — | 1 |
| AS6172US | MUSD-INTERNET - Mesa Public Schools | 65.5K | — | 3 |
| AS32417US | ELONU-AS - Elon University | 65.5K | — | 1 |
| AS398757US | FTC-ASN - Federal Trade Commission | 65.5K | — | 1 |
| AS15119US | SOUTHERN-ILLINOIS-UNIVERSITY - Southern Illinois University Carbondale | 65.5K | — | 1 |
| AS33170US | MORGAN-STATE-UNIVERSITY - Morgan State University | 65.5K | — | 1 |
| AS393529US | VUMC - Vanderbilt University Medical Center | 65.5K | 1 | 2 |
| AS7301US | NAS-AS - National Academy of Sciences | 65.5K | — | 1 |
| AS27219US | SUNY-CORTLAND - SUNY College at Cortland | 65.5K | — | 1 |
| AS4597US | MILLIPORE - Millipore Corp. | 65.5K | 1 | 2 |