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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) | 227.4M | 3,133 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 217.9M | 24,372 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 643 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.7M | 1,322 |
| 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.
32,235 autonomous systems registered to United States. Click an AS for detail.
| 72.9M |
| 229 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 437 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 51.6M | 3,906 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.9M | 2,006 |
| AS701US | UUNET - Verizon Business | 43.6M | 993 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.7M | 4,275 |
| 65.8K |
| 256 |
| 3 |
| AS3446US | KANSAS - State of Kansas | 65.8K | — | 2 |
| AS395501US | REED-AS-1 - The Reed Institute | 65.8K | — | 2 |
| AS46298US | HCHD-AS - Harris County Hospital District | 65.8K | — | 2 |
| AS14319US | FURMAN-2 - Furman University | 65.8K | — | 2 |
| AS30679US | CPPNET - California State Polytechnic University - Pomona | 65.8K | 1 | 3 |
| AS33281US | BRIGHAM-YOUNG-UNIVERSITY-IDAHO - BRIGHAM YOUNG UNIVERSITY - IDAHO | 65.8K | 1 | 3 |
| AS18791US | TCU - Texas Christian University | 65.8K | — | 2 |
| AS393649US | BOOZ-AS2 - Booz Allen Hamilton Inc. | 65.8K | — | 2 |
| AS34US | UDELNET - University of Delaware | 65.8K | 65.5K | 3 |
| AS323US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 65.8K | 256 | 3 |
| AS33401US | CPCC - Central Piedmont Community College | 65.8K | — | 2 |
| AS6406US | CEBAF - Thomas Jefferson National Accelerator Facility | 65.8K | 1 | 3 |
| AS6510US | BYU - Brigham Young University | 65.8K | 256 | 3 |
| AS36161US | WESTCHESTERCOUNTY-NY - County of Westchester | 65.8K | — | 3 |
| AS11399US | WILLIAMSCOLLEGE - Williams College | 65.8K | 19 | 7 |
| AS3634US | SFASU-AS - Stephen F. Austin State University | 65.8K | 65.5K | 3 |
| AS13513US | ALFRED-UNIVERSITY - Alfred University | 65.8K | — | 2 |
| AS26488US | SCU-ASN - Santa Clara University | 65.8K | — | 2 |
| AS13918US | CITYOFTUCSON - City of Tucson | 65.8K | — | 2 |
| AS7939US | UNIVCENTFLA - University of Central Florida | 65.8K | — | 61 |
| AS10631US | GSU10631 - Georgia State University | 65.8K | — | 2 |
| AS46483US | RGHS - Unity Health System | 65.8K | — | 2 |
| AS205US | MONTCLAIR-AS - Montclair State University | 65.8K | — | 2 |
| AS53695US | SIUE - Southern Illinois University at Edwardsville | 65.8K | — | 13 |
| AS22323US | UNIVERSITY-OF-CALIFORNIA-MERCED - University of California, Merced | 65.8K | — | 2 |
| AS399569US | VU-NET - Vincennes University | 65.8K | — | 2 |
| AS398846US | LOGIS-AS-1 - Local Government Information Systems Association | 65.8K | 65.5K | 3 |
| AS17152US | BATES - Bates College | 65.8K | 65.5K | 3 |
| AS6377US | 4JNET - Eugene School District 4J | 65.8K | 1 | 3 |
| AS20126US | UC-DOM - University of Cincinnati | 65.8K | — | 2 |
| AS7773US | SD-NET - South Dakota State Government | 65.8K | — | 2 |
| AS4385US | RIT-ASN - Rochester Institute of Technology | 65.8K | 1 | 3 |
| AS33527US | MGN-2 - Metropolitan Government of Nashville and Davidson County Tennessee | 65.8K | — | 2 |
| AS22198US | LAFAYE - Lafayette College | 65.8K | — | 2 |
| AS33343US | HCHBNET - U.S. Department of Commerce, HQ and ITA | 65.8K | 2K | 4 |
| AS2037US | CSUFRESNO - California State University at Fresno | 66K | — | 2 |
| AS23171US | MANHATTAN-EDU - Manhattan College | 66K | 1 | 4 |
| AS18980US | PEACEHEALTH - Peace Health | 66K | — | 3 |
| AS46476US | TTUHSC - Texas Tech University Health Sciences Center | 66K | 256 | 5 |
| AS1206US | PSCNET-HS-AS - Pittsburgh Supercomputing Center | 66K | — | 3 |
| AS47024US | THE-METROHEALTH-SYSTEM - The MetroHealth System | 66K | — | 3 |
| AS22845US | VIRGINIA-COMMUNITY-COLLEGE-SYSTEM - Virginia Community College System | 66K | — | 3 |
| AS22217US | CALVIN-UNIVERSITY - Calvin College | 66K | — | 3 |
| AS20249US | AS20249 - Jefferies LLC | 66K | — | 51 |
| AS77US | JHUAPL-AS - Johns Hopkins University Applied Physics Laboratory | 66K | — | 3 |
| AS14827US | WSDOT-ASN - Washington State Department of Transportation | 66K | — | 2 |