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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 |
| 217.7K |
| 1M |
| 10 |
| AS70US | NLM-GW - National Library of Medicine | 217.1K | 2 | 67 |
| AS55256US | NETSKOPE - Netskope Inc | 215K | — | 661 |
| AS16839US | SNC - SERVICENOW, INC. | 215K | 33 | 147 |
| AS46255US | CHARLOTTE-MECKLENBURG-SCHOOLS-NC - Charlotte-Mecklenburg Schools | 214.8K | — | 34 |
| AS53755US | IOFLOOD - Input Output Flood LLC | 213.2K | 135.2K | 175 |
| AS2055US | LSU - Louisiana State University | 212K | 65.8K | 21 |
| AS22552US | ESITED - eSited Solutions | 212K | 65.5K | 38 |
| AS10846US | DEERE - Deere & Company | 211.2K | 1 | 26 |
| AS16524US | METTEL - MetTel | 210.9K | 135.2K | 230 |
| AS54804US | CSMIII-BUNKIELA - CableSouth Media III LLC | 209.4K | 65.5K | 82 |
| AS7896US | NU-AS - The Board of Regents of the University of Nebraska | 209.2K | 1M | 8 |
| AS40676US | AS40676 - Psychz Networks | 209.2K | 492.7K | 614 |
| AS21517US | KSU-KENNESAW-01 - Kennesaw State University | 208.9K | — | 14 |
| AS14US | COLUMBIA-GW - Columbia University | 208.9K | 65.5K | 12 |
| AS11188US | LACOUNTY-ISD - LOS ANGELES COUNTY - INTERNAL SERVICESDIVISION | 208.1K | — | 49 |
| AS25US | UCB - University of California at Berkeley | 206.1K | 65.5K | 15 |
| AS29838US | AMC - Atlantic Metro Communications II, Inc. | 206.1K | 142.3K | 134 |
| AS340US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 205.6K | 256 | 8 |
| AS14381US | CATERPILLAR-INC - Caterpillar, Inc. | 205.1K | 65.6K | 42 |
| AS25935US | WNYRIC-NET - Erie 1 BOCES | 205.1K | — | 21 |
| AS1742US | HARVARD-UNIV - Harvard University | 204.6K | 69.6K | 18 |
| AS36850US | UNC-CH - University of North Carolina at Chapel Hill | 203.5K | 65.5K | 11 |
| AS7795US | LUMOS - LUMOS Networks, Inc. | 203.5K | 65.5K | 117 |
| AS5653US | UCSF - University of California San Francisco | 201K | — | 20 |
| AS3495US | SENATE-AS - US Senate | 201K | 2 | 20 |
| AS36647US | YAHOO-GQ1 - Yahoo Holdings Inc. | 201K | 17 | 75 |
| AS14551US | UUNET-SA - Verizon Business | 199.4K | — | 9 |
| AS4185US | ATTIS-ASN4185 - AT&T Enterprises, LLC | 199.2K | 18 | 16 |
| AS64226US | MDURESOURCES - MDU Resources Group, Inc. | 199.2K | — | 17 |
| AS14041US | AS-FRGP - University Corporation for Atmospheric Research | 198.9K | 257 | 12 |
| AS20343US | PEPPERDINE - Pepperdine University | 198.9K | — | 16 |
| AS13541US | SIEMENS-DISW-WIV-B-ORW - Siemens Industry Software Inc. | 198.7K | 256 | 8 |
| AS36291US | SANOFI - Sanofi | 198.7K | — | 10 |
| AS46US | RUTGERS - Rutgers, The State University | 198.7K | 4 | 10 |
| AS19855US | MASERGY - Masergy Communications, Inc. | 198.4K | 196.6K | 103 |
| AS159US | OSUNET-AS - Ohio State University | 198.4K | 1 | 8 |
| AS399898US | CONEXON-CONNECT - Conexon Connect | 198.4K | 19.9M | 114 |
| AS7150US | CUPANET-BLM-AS - Commonwealth University of Pennsylvania | 198.4K | — | 7 |
| AS11719US | EATON-CORPORATION - Eaton Corporation | 198.1K | — | 9 |
| AS395959US | XEROX-ELL - XEROX CORPORATION | 197.9K | — | 7 |
| AS2553US | FSU-AS - Florida State University | 197.9K | 1 | 8 |
| AS11442US | NCSU - North Carolina State University | 197.6K | 65.5K | 5 |
| AS1999US | HOUSE-AS-1 - U.S. House of Representatives | 197.6K | 4 | 8 |
| AS40831US | PHS - Mass General Brigham Incorporated | 197.4K | — | 6 |
| AS26US | CORNELL - Cornell University | 197.4K | 16 | 7 |
| AS331US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 197.1K | 256 | 6 |