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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 |
| UTEXAS - University of Texas at Austin |
| 299.5K |
| — |
| 8 |
| AS683US | ARGONNE-AS - Argonne National Laboratory | 298.2K | 16.6K | 34 |
| AS82US | OPENTEXT - Attachmate Corp. | 297K | 257 | 12 |
| AS11714US | NETWORK NEBRASKA - Network Nebraska | 294.7K | 65.6K | 34 |
| AS35847US | AS-EFTL - Ezee Fiber | 293.6K | 66.4K | 93 |
| AS557US | UMAINE-SYS-AS - University of Maine System | 292.9K | 65.5K | 18 |
| AS6300US | CCI-TEXAS - Fidium | 289K | 65.5K | 76 |
| AS3663US | NETNET-NET - NetNet | 288.5K | 65.5K | 49 |
| AS2386US | INS-AS - AT&T Enterprises, LLC | 287.5K | 4.1K | 402 |
| AS7127US | SCE - Southern California Edison | 287K | — | 6 |
| AS391US | AFCONC-BLOCK1-AS - Air Force Systems Networking | 286.2K | — | 41 |
| AS10455US | LUCENT-CIO - Nokia of America Corporation | 284.7K | 51 | 42 |
| AS25956US | LOGIXCOMM-AS4 - Logix | 282.9K | 66.8K | 179 |
| AS8147US | ASERICY - Ericsson Inc. | 280.1K | 5 | 16 |
| AS8069US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 279K | — | 764 |
| AS6966US | USDOS - U.S. Department of State | 278.3K | — | 17 |
| AS23352US | SERVERCENTRAL - DEFT.COM | 277.8K | 100.6K | 146 |
| AS13693US | NTS-ONLINE - Vexus Fiber | 277K | 69.4K | 435 |
| AS156US | NORTHEASTERN-GW-AS - Northeastern University | 272.6K | — | 14 |
| AS5180US | DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) | 271.9K | — | 57 |
| AS122US | UPMC-AS122 - UPMC | 271.6K | 65.5K | 13 |
| AS409US | AFCONC-BLOCK1-AS - Air Force Systems Networking | 270.8K | — | 13 |
| AS11975US | WM - The College of William and Mary | 270.6K | — | 8 |
| AS2576US | DOT-AS - U. S. Department of Transportation | 269.3K | 94 | 54 |
| AS10273US | FPL - Florida Power & Light Company | 268.5K | — | 27 |
| AS5277US | DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) | 267.8K | 1 | 21 |
| AS11377US | SENDGRID - SendGrid, Inc. | 267.3K | — | 144 |
| AS13767US | DATABANK-DFW - DataBank Holdings, Ltd. | 267K | 138.8K | 267 |
| AS10995US | PNCBANK - PNC Bank N.A. | 266.5K | — | 20 |
| AS30449US | AZSTATE - State of Arizona | 265.2K | — | 17 |
| AS3512US | EUSHC - Emory University | 264.7K | — | 10 |
| AS5778US | CENTURYLINK-LEGACY-EMBARQ-RCMT - CenturyLink Communications, LLC | 264.7K | — | 98 |
| AS10384US | TVA - Tennessee Valley Authority | 264.4K | 65.5K | 16 |
| AS27357US | RACKSPACE - Rackspace Hosting | 264.2K | 65.5K | 38 |
| AS10879US | UHC - Unitedhealthcare | 264.2K | — | 96 |
| AS19902US | NET-STATE-OHIO - Department of Administrative Services | 263.7K | — | 6 |
| AS17US | PURDUE - Purdue University | 263.7K | 65.6K | 12 |
| AS6102US | CBSCORPORATE - CBS inc. | 263.4K | — | 16 |
| AS36384US | GOOGLE-IT - Google LLC | 262.9K | 65.5K | 5 |
| AS5719US | SUNYSB - State University of New York at Stony Brook | 262.9K | 20 | 11 |
| AS16989US | UTHSC - The University of Tennessee Health Science Center | 262.7K | — | 8 |
| AS11577US | ADS-ASN - Vermont Agency of Digital Services | 262.4K | — | 7 |
| AS55US | UPENN - University of Pennsylvania | 262.4K | 65.5K | 6 |
| AS14298US | EPA-NET - Environmental Protection Agency | 262.4K | 4.1K | 5 |
| AS299US | UCINET-AS - University of California, Irvine | 262.4K | 65.5K | 6 |
| AS292US | ESNET-WEST - ESnet | 262.1K | — | 1 |
| AS291US | ESNET-EAST - ESnet | 262.1K | — | 1 |