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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) | 227.5M | 3,133 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 218M | 23,695 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 643 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.6M | 1,300 |
| 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.
32,143 autonomous systems registered to United States. Click an AS for detail.
| 73.1M |
| 232 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 437 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 51.5M | 3,820 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.8M | 1,994 |
| AS701US | UUNET - Verizon Business | 43.6M | 995 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,278 |
| 212K |
| 65.5K |
| 38 |
| AS10846US | DEERE - Deere & Company | 211.2K | 1 | 26 |
| AS7896US | NU-AS - The Board of Regents of the University of Nebraska | 209.2K | 1M | 8 |
| 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 |
| AS29838US | AMC - Atlantic Metro Communications II, Inc. | 207.6K | 142.6K | 137 |
| AS16524US | METTEL - MetTel | 207.4K | 135.2K | 223 |
| AS54804US | CSMIII-BUNKIELA - CableSouth Media III LLC | 207.1K | 65.5K | 79 |
| AS25US | UCB - University of California at Berkeley | 206.1K | 65.5K | 15 |
| 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 |
| AS398465US | RACKDOG-LLC - Rackdog, LLC | 203.3K | 1.7M | 191 |
| AS40676US | AS40676 - Psychz Networks | 203K | 492.7K | 603 |
| AS36647US | YAHOO-GQ1 - Yahoo Holdings Inc. | 201K | 17 | 75 |
| AS3495US | SENATE-AS - US Senate | 201K | 2 | 20 |
| AS5653US | UCSF - University of California San Francisco | 199.9K | — | 16 |
| AS14551US | UUNET-SA - Verizon Business | 199.4K | — | 9 |
| AS19318US | IS-AS-1 - Interserver, Inc | 199.4K | 7.9M | 147 |
| AS4186US | ATTIS-ASN4186 - AT&T Enterprises, LLC | 199.2K | 2 | 15 |
| AS14041US | AS-FRGP - University Corporation for Atmospheric Research | 198.9K | 257 | 12 |
| AS20343US | PEPPERDINE - Pepperdine University | 198.9K | — | 16 |
| AS64226US | MDURESOURCES - MDU Resources Group, Inc. | 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 |
| AS159US | OSUNET-AS - Ohio State University | 198.4K | 1 | 8 |
| AS19855US | MASERGY - Masergy Communications, Inc. | 198.4K | 196.6K | 103 |
| 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 |
| AS26US | CORNELL - Cornell University | 197.4K | 16 | 7 |
| AS331US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 197.1K | 256 | 6 |
| AS40831US | PHS - Mass General Brigham Incorporated | 197.1K | — | 5 |
| AS11279US | GEORGE-MASON-UNIV - George Mason University | 197.1K | 256 | 17 |
| AS1657US | LOUISVILLE - University of Louisville | 196.9K | 1 | 15 |
| AS17324US | ALNET - Yeshiva University | 196.6K | 12.3K | 14 |
| AS3593US | FRONTIER-EPIX - Frontier Communications of America, Inc. | 193K | — | 55 |
| AS12025US | IMDC-AS12025 - Iron Mountain Data Center | 192.3K | 217.4K | 731 |
| AS196US | BOEING196 - The Boeing Company | 191.5K | — | 16 |
| AS8030US | WORLDNET5-10 - AT&T WorldNet | 191.2K | — | 40 |
| AS8015US | US-SIGNAL-MN01 - US Signal Company, L.L.C. | 189.2K | 65.8K | 11 |