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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. | 217.9M | 23,731 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 644 |
| 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.
32,144 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 | 3,838 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.8M | 1,995 |
| AS701US | UUNET - Verizon Business | 43.6M | 995 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,313 |
| — |
| 512 |
| 2 |
| AS6393US | PRYSM-AS - Prysm Technologies | — | — | 0 |
| AS6554US | BDM - BDM Federal, Inc. | — | — | 0 |
| AS6441US | BIGBOOK - BigBook | — | — | 0 |
| AS6416US | NOVELL-AS - Micro Focus | — | — | 0 |
| AS4942US | B-NET - B-Net Technologies | — | — | 0 |
| AS4264US | CERNET-ASN-BLOCK - California Education and Research Federation Network | — | — | 0 |
| AS397950US | TRIN-01 - WiseTech Global | — | — | 0 |
| AS402653US | WCUUSD-2026-ASN - Washington | — | 16 | 1 |
| AS5804US | DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | — | — | 0 |
| AS4288US | CENTURYLINK-TSDS-NCJCVL - CenturyLink Communications, LLC | — | — | 0 |
| AS4207US | NET-INTRNET - Allied Access Inc. | — | — | 0 |
| AS4185US | ATTIS-ASN4185 - AT&T Enterprises, LLC | — | — | 0 |
| AS5657US | NOVAIAC-ASN - FC Business Systems | — | — | 0 |
| AS4102US | DNIC-ASBLK-04065-04125 - Headquarters, USAISC | — | — | 0 |
| AS5866US | DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | — | — | 0 |
| AS214974US | ZEROTECH-AS ZEROTECH CLOUD LLC | — | 1 | 1 |
| AS5326US | DNIC-ASBLK-05120-05376 - United States Department of Defense (DoD) | — | — | 0 |
| AS5700US | XL-NET - MISHA, Inc. | — | — | 0 |
| AS27308US | INTELEMAGE - Intelemage, LLC | — | — | 0 |
| AS1504US | DNIC-AS-01504 - Headquarters, USAISC | — | — | 0 |
| AS3153US | FEMANET - Federal Emergency Management Agency | — | — | 0 |
| AS46386US | ZANA-AS-2 - Osir, Inc. | — | 32 | 1 |
| AS312US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | — | — | 0 |
| AS508US | AFCONC-BLOCK1-AS - Air Force Systems Networking | — | — | 0 |
| AS418US | AFCONC-BLOCK1-AS - Air Force Systems Networking | — | — | 0 |
| AS401US | AFCONC-BLOCK1-AS - Air Force Systems Networking | — | — | 0 |
| AS280US | NTTA-280 - NTT America, Inc. | — | — | 0 |
| AS598US | CENTURYLINK-LEGACY-LVLT-598 - Level 3 Parent, LLC | — | — | 0 |
| AS244US | DNIC-AS-00244 - United States Department of Defense (DoD) | — | — | 0 |
| AS397955US | DEEPSOUTHCOMMUNICATIONS - Deep South Communications LLC | — | 1 | 1 |
| AS1202US | AS1202 - National Aeronautics and Space Administration | — | — | 0 |
| AS67US | SDC-PRC-AS - Unisys Corporation | — | — | 0 |
| AS1524US | DNIC-ASBLK-01522-01526 - Headquarters, USAISC | — | — | 0 |
| AS17263US | TN-ASN-NM - Tarakona Networks, LLC | — | — | 0 |
| AS1367US | DNIC-AS-01367 - Navy Network Information Center (NNIC) | — | — | 0 |
| AS1400US | T2-CT-ASC - Charles Schwab & Co., Inc. | — | — | 0 |
| AS1340US | ANSBB-ASNNET-1 - Verizon Business | — | — | 0 |
| AS11021US | NVH-ASN - North Valley Hospital | — | 256 | 1 |
| AS6277US | COGENT-6277 - Cogent Communications, LLC | — | — | 0 |
| AS700US | ROKNET-AS - The Boeing Company | — | — | 0 |
| AS6008US | DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | — | — | 0 |
| AS6365US | AS6365NET - Internet 1st, Inc. | — | — | 0 |
| AS6156US | SPRINTLINK-NYSERNET7 - SPRINT, Business Serices Group | — | — | 0 |
| AS402270US | SOFTERYX-INC - Softeryx | — | 256 | 1 |
| AS6038US | DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | — | — | 0 |
| AS57848US | SKY Sky Walters | — | 3 | 3 |