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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 | 3,136 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 210.5M | 20,721 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 113.7M | 638 |
| AS721US | DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) | 73.1M | 229 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC |
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.
31,994 autonomous systems registered to United States. Click an AS for detail.
| 68.3M |
| 366 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 66.4M | 1,106 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 47.9M | 3,574 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.7M | 1,926 |
| AS701US | UUNET - Verizon Business | 43.6M | 1,000 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.2M | 4,508 |
| MGN-2 - Metropolitan Government of Nashville and Davidson County Tennessee |
| 65.8K |
| — |
| 2 |
| AS46298US | HCHD-AS - Harris County Hospital District | 65.8K | — | 2 |
| AS36161US | WESTCHESTERCOUNTY-NY - County of Westchester | 65.8K | — | 3 |
| AS20249US | AS20249 - Jefferies LLC | 65.8K | — | 50 |
| AS25709US | LAMARUNIV - Lamar University | 65.8K | — | 2 |
| AS7939US | UNIVCENTFLA - University of Central Florida | 65.8K | — | 61 |
| AS46483US | RGHS - Unity Health System | 65.8K | — | 2 |
| AS15295US | UNC-1388600-ASN - University of Northern Colorado | 65.8K | — | 2 |
| AS6377US | 4JNET - Eugene School District 4J | 65.8K | 1 | 3 |
| AS14223US | NYSDOH - New York State Department of Health | 65.8K | — | 2 |
| AS393649US | BOOZ-AS2 - Booz Allen Hamilton Inc. | 65.8K | — | 2 |
| AS10357US | JMUNET - James Madison University | 65.8K | — | 2 |
| AS6406US | CEBAF - Thomas Jefferson National Accelerator Facility | 65.8K | 1 | 3 |
| AS30679US | CPPNET - California State Polytechnic University - Pomona | 65.8K | 1 | 3 |
| AS3446US | KANSAS - State of Kansas | 65.8K | — | 2 |
| AS33401US | CPCC - Central Piedmont Community College | 65.8K | — | 2 |
| AS400943US | UNO-CSCI-LONI - University Of New Orleans | 65.8K | — | 2 |
| AS2496US | UKANS - University of Kansas | 65.8K | 1K | 3 |
| AS22323US | UNIVERSITY-OF-CALIFORNIA-MERCED - University of California, Merced | 65.8K | — | 2 |
| AS545US | NRI - Corporation for National Research Initiatives | 65.8K | 16 | 3 |
| AS4201US | ORST-AS - Oregon State University | 65.8K | 256 | 3 |
| AS29899US | GEISINGER - Geisinger System Services | 65.8K | 256 | 3 |
| AS17152US | BATES - Bates College | 65.8K | 65.5K | 3 |
| AS34US | UDELNET - University of Delaware | 65.8K | 65.5K | 3 |
| AS1358US | HNSNET-AS - Hughes Network Systems, LLC | 65.8K | — | 8 |
| AS395501US | REED-AS-1 - The Reed Institute | 65.8K | — | 2 |
| AS6510US | BYU - Brigham Young University | 65.8K | 256 | 3 |
| AS15173US | NEWMA-11 - Newmarket Corporation | 65.8K | — | 2 |
| AS22845US | VIRGINIA-COMMUNITY-COLLEGE-SYSTEM - Virginia Community College System | 65.8K | — | 2 |
| AS33281US | BRIGHAM-YOUNG-UNIVERSITY-IDAHO - BRIGHAM YOUNG UNIVERSITY - IDAHO | 65.8K | 1 | 3 |
| AS16860US | ASN-HEALT-82 - HealthPlan Services, Inc. | 65.8K | — | 2 |
| AS10561US | BRANDEIS - Brandeis University | 65.8K | — | 2 |
| AS26488US | SCU-ASN - Santa Clara University | 65.8K | — | 4 |
| AS11399US | WILLIAMSCOLLEGE - Williams College | 65.8K | 19 | 7 |
| AS8036US | UTULSA-AS - University of Tulsa | 65.8K | 256 | 4 |
| AS3671US | SLAC - SLAC National Accelerator Laboratory | 65.8K | 16 | 3 |
| AS3634US | SFASU-AS - Stephen F. Austin State University | 65.8K | 65.5K | 3 |
| AS32234US | UD-ACA-AS - University of Dayton | 65.8K | 16 | 3 |
| AS323US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 65.8K | 256 | 3 |
| AS25968US | SELUNET - Southeastern Louisiana University | 65.8K | — | 2 |
| AS14319US | FURMAN-2 - Furman University | 65.8K | — | 2 |
| AS22089US | HALLMARK - Hallmark Cards Inc. | 65.8K | — | 2 |
| AS22198US | LAFAYE - Lafayette College | 65.8K | — | 2 |
| AS13513US | ALFRED-UNIVERSITY - Alfred University | 65.8K | — | 2 |
| AS11540US | RTI - Research Triangle Institute | 65.8K | 1 | 3 |
| AS399315US | INDSTATE - Indiana State University | 65.8K | — | 2 |
| AS10662US | NORFOLK-SOUTHERN - Norfolk Southern Corporation | 65.8K | — | 2 |