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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) |
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.
| 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 |
| SYRACUSE-UNIVERSITY - Syracuse University |
| 132.1K |
| 1 |
| 10 |
| AS398537US | KUTZTOWN-01 - Kutztown University | 132.1K | 4.1K | 7 |
| AS14822US | MSKCC - Memorial Sloan-Kettering Cancer Center | 132.1K | — | 7 |
| AS32666US | CWRU-AS-1 - Case Western Reserve University | 131.8K | 65.5K | 21 |
| AS10370US | NORTHWEST-AIRLINES - Northwest Airlines | 131.8K | — | 5 |
| AS2024US | NU - Eversource Energy | 131.8K | — | 5 |
| AS20337US | SUNYPOLY-ASN - SUNY Institute of Technology | 131.8K | — | 5 |
| AS398564US | EUP-SCOTS-NET - Pennsylvania Western University | 131.8K | — | 13 |
| AS2013US | PACIFIC-GAS - PG&E | 131.8K | — | 5 |
| AS53828US | NITEL - NETWORK INNOVATIONS, LLC | 131.8K | 65.5K | 21 |
| AS5707US | UTHSC-H - The University of Texas Health Science Center at Houston | 131.6K | — | 3 |
| AS398655US | CALU-ASN - Pennsylvania Western University | 131.6K | — | 4 |
| AS1580US | DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) | 131.6K | — | 4 |
| AS11834US | DREXEL-ASN - Drexel University | 131.6K | — | 4 |
| AS36081US | STATE-OF-COLORADO-MNT-NETWORK - The Governor's Office of Information Technology | 131.6K | — | 4 |
| AS63319US | FDU - Fairleigh Dickinson University | 131.6K | — | 4 |
| AS398663US | SHIPPENSBURG-UNIVERSITY-01 - Shippensburg University | 131.6K | 6.1K | 6 |
| AS22990US | ALBANYEDU - University at Albany, State University of New York | 131.6K | 257 | 7 |
| AS13748US | CSHL - Cold Spring Harbor Laboratory | 131.6K | — | 5 |
| AS1832US | SMU - Southern Methodist University | 131.3K | — | 3 |
| AS3778US | TEMPLE - Temple University | 131.3K | 65.5K | 4 |
| AS23162US | UKYEDU - University of Kentucky | 131.3K | — | 3 |
| AS29885US | UCHHS-AS - Univeristy of Chicago Hospitals & Health System | 131.3K | — | 4 |
| AS5831US | DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | 131.3K | — | 3 |
| AS26488US | SCU-ASN - Santa Clara University | 131.3K | — | 5 |
| AS3676US | UIOWA-AS - University of Iowa | 131.3K | 8 | 4 |
| AS46290US | MTSAC - MtSAC | 131.3K | — | 4 |
| AS2544US | METRO-AS - King County Gov | 131.3K | — | 22 |
| AS30674US | BAYLORU - Baylor University | 131.3K | 65.5K | 11 |
| AS365US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 131.3K | 256 | 4 |
| AS14048US | MEMPHIS-EDU - The University of Memphis | 131.3K | — | 4 |
| AS21984US | FCPS - Fairfax County Public Schools | 131.3K | — | 6 |
| AS1563US | DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) | 131.3K | — | 3 |
| AS2495US | KANREN - Kansas Research and Education Network | 131.3K | 65.5K | 4 |
| AS54885US | STATE-OF-IDAHO-SECONDARY-ASN - State of Idaho | 131.3K | — | 11 |
| AS25969US | SLU - St. Louis University | 131.1K | — | 9 |
| AS355US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 131.1K | 256 | 4 |
| AS14702US | INL-ASN2 - Idaho National Laboratory | 131.1K | 16 | 3 |
| AS13636US | NECAM-AS - NEC Corporation of America | 131.1K | — | 2 |
| AS26046US | USU-EDU - Utah State University | 131.1K | — | 2 |
| AS25656US | OLEMISSS - University of Mississippi | 131.1K | 1 | 4 |
| AS21783US | SILVERNET - State of Nevada | 131.1K | — | 3 |
| AS343US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 131.1K | 256 | 3 |
| AS48US | DNIC-AS-00048 - Navy Network Information Center (NNIC) | 131.1K | 1 | 3 |
| AS19464US | WASHINGTON-AND-LEE - Washington & Lee University | 131.1K | — | 3 |
| AS14348US | URI-AS - University of Rhode Island | 131.1K | — | 3 |
| AS3452US | UAB-AS - University of Alabama at Birmingham | 131.1K | — | 3 |