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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 |
| 259.3K |
| 65.5K |
| 36 |
| AS203US | CENTURYLINK-LEGACY-LVLT-203 - Level 3 Parent, LLC | 259.2K | — | 134 |
| AS335US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 258.8K | 256 | 235 |
| AS20311US | VALERO - Valero Corporate Services | 258K | — | 33 |
| AS7270US | NET2PHONE - IDT Corporation | 256.5K | — | 108 |
| AS32244US | LIQUIDWEB - Liquid Web, L.L.C | 256K | 24.6K | 58 |
| AS6360US | UNIVHAWAII - University of Hawaii | 255.5K | 65.5K | 12 |
| AS979US | NETLAB-SDN - NetLab Global | 251.9K | — | 584 |
| AS14325US | OSHEAN - OSHEAN, Inc. | 251.6K | 131.1K | 28 |
| AS12119US | I3BROADBAND - ITV-3 | 250.6K | 65.5K | 103 |
| AS46450US | PILOT - Pilot Fiber, Inc. | 248.8K | 65.6K | 273 |
| AS396356US | LATITUDE-SH - Latitude.sh | 247.8K | 803.6K | 1,064 |
| AS6039US | DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | 242.9K | — | 68 |
| AS5371US | DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) | 242.9K | — | 251 |
| AS54801US | ZILLION-NETWORK - Zillion Network Inc. | 242.4K | — | 227 |
| AS20021US | LNH-INC - Ntirety, Inc. | 241.7K | 131.1K | 26 |
| AS3464US | ASC-NET - Alabama Supercomputer Authority | 240.9K | 98.8K | 121 |
| AS225US | VIRGINIA-AS - University of Virginia | 240.1K | — | 21 |
| AS138US | DNIC-AS-00138 - United States Department of Defense (DoD) | 239.6K | — | 25 |
| AS73US | WASHINGTON-AS - University of Washington | 239.1K | 65.5K | 11 |
| AS23473US | PAVLOVMEDIA - PAVLOV MEDIA INC | 238.8K | 81.7K | 826 |
| AS19871US | NETWORK-SOLUTIONS-HOSTING - Network Solutions, LLC | 238.6K | 16 | 211 |
| AS19551US | INCAPSULA - Incapsula Inc | 237.1K | 723 | 1,649 |
| AS14051US | SUREWEST - Fidium | 236.8K | 135.2K | 111 |
| AS400619US | AROSS-AS - AROSSCLOUD INC. | 236.8K | — | 398 |
| AS1602US | DNIC-AS-01602 - Headquarters, USAISC | 236.8K | 4 | 144 |
| AS15224US | OMNITURE - Adobe Inc. | 236K | 8 | 85 |
| AS35908US | VPLSNET - Krypt Technologies | 234.8K | 133.1K | 495 |
| AS1600US | DNIC-ASBLK-01550-01601 - United States Department of Defense (DoD) | 234K | 7 | 178 |
| AS398823US | PEG-LA - PEG TECH INC | 232.4K | — | 97 |
| AS1637US | DNIC-AS-01637 - Headquarters, USAISC | 232.2K | 1 | 119 |
| AS2920US | LACOE - Los Angeles County Office of Education | 231.7K | — | 226 |
| AS20412US | CLARITY-TELECOM - Clarity Telecom LLC | 231.7K | 4.3K | 420 |
| AS32982US | DOE-HQ - U.S. Department of Energy | 231.4K | 69.7K | 39 |
| AS1998US | STATE-OF-MN - State of Minnesota | 230.9K | 65.5K | 11 |
| AS6527US | MASSACHUSETTS - Commonwealth of Massachusetts | 230.4K | — | 13 |
| AS10405US | UPRR-ASN-01 - Union Pacific Railroad Company | 229.4K | — | 7 |
| AS13760US | UNITI-FIBER - Uniti Fiber Holdings Inc. | 229.1K | 200.7K | 176 |
| AS22351US | INTELSAT-1 - INTELSAT GLOBAL SERVICE CORPORATION | 228.4K | 196.6K | 84 |
| AS20278US | NEXEON - Nexeon Technologies, Inc. | 227.8K | 69.7K | 268 |
| AS398465US | RACKDOG-LLC - Rackdog, LLC | 225.3K | 1.2M | 200 |
| AS3360US | DXC-AS3360 - DXC US Latin America Corporation | 224.3K | 108 | 459 |
| AS1706US | UNIV-ARIZ - The University of Arizona | 222K | 65.5K | 66 |
| AS11976US | FIDN - Fidelity Communication International Inc. | 221.7K | — | 417 |
| AS30404US | BLUESTREAMFIBER - Blue Stream | 221.4K | 1.2M | 26 |
| AS46261US | QUICKPACKET - QuickPacket, LLC | 221.2K | 65.6K | 442 |
| AS665US | DNIC-ASBLK-00616-00665 - United States Department of Defense (DoD) | 219.6K | — | 41 |