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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 |
| — |
| — |
| 0 |
| AS402653US | WCUUSD-2026-ASN - Washington | — | 16 | 1 |
| AS20447US | KITAUJI-NETWORKS - Kitauji Networks LLC | — | 256 | 1 |
| AS218890US | YuriSystemsLLC Yuri Systems LLC | — | 5 | 5 |
| AS55126US | HPDF-JLAB - High Performance Data Facility | — | 1 | 1 |
| AS32451US | TX-CLOUD - BigTech | — | — | 0 |
| AS402659US | USA-FED-ASN-01 - Entrust | — | 1 | 1 |
| AS218654US | SWISH-WORLD Swish World Group Inc. | — | 2 | 2 |
| AS3381US | MHPCC-AS - Maui High Performance Computing Center | — | 1 | 1 |
| AS6025US | DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | — | 6 | 6 |
| AS5980US | DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | — | 1 | 1 |
| AS402406US | LINQ-APP - Linq | — | 2 | 2 |
| AS219255US | Lee-World Derek Lee | — | 1 | 1 |
| AS14719US | MICROSOFT-CORP-BCENTRAL - Microsoft Corporation | — | — | 0 |
| AS26689US | CL-IX - H5 Data Centers | — | — | 0 |
| AS397800US | AS-PRIMARY - ANVIL Systems Group, INC | — | 1 | 1 |
| AS575US | DNIC-AS-00575 - Headquarters, USAISC | — | 256 | 1 |
| AS402667US | CL-2372-AS-1 - Croan, | — | 256 | 1 |
| AS13502US | VOYA-FINANCIAL - Voya Services Company | — | — | 0 |
| AS394882US | JUPITERCLOUD - Jupiter Cloud LLC | — | 2 | 2 |
| AS14682US | GGS - GGS Information Services | — | — | 0 |
| AS200731US | JSN-AS Jonathan Smith | — | 11 | 11 |
| AS3754US | NYSERNET3-AS - NYSERNet | — | 1 | 1 |
| AS215313US | LINEAR-NETWORK Emily Ingalls | — | 17 | 2 |
| AS14082US | GOES - Global Online Electronic Services | — | — | 0 |
| AS54118US | RRI-FMT2-01 - Robbins Research International Inc | — | 1 | 1 |
| AS14071US | PQ-CORPORATION - PQ Corporation | — | — | 0 |
| AS399670US | COMPUTE - HKSOFT | — | 1 | 1 |
| AS11148US | VRIS-11145-11149 - Verizon Business | — | — | 0 |
| AS211411US | wylie Wylie Fowler | — | 2 | 2 |
| AS972US | CF3 - Cofractal, Inc. | — | 3 | 3 |
| AS54852US | F4-NETWORKS - F4 Networks | — | 1 | 1 |
| AS32935US | AS32935 - XC Networks, Ltd. | — | — | 0 |
| AS30581US | SUNOAKI-NET - Sunoaki Network LLC | — | 1 | 1 |
| AS401947US | TRIAD-PATHFINDERS - Triad Pathfinders LLC | — | 2 | 2 |
| AS402402US | CELL - Infoecell | — | 1M | 2 |
| AS33624US | DHHS-OIG - U.S. Dept. of Health & Human Services - Office of Inspector General | — | — | 0 |
| AS402474US | LMESSER-LABS - Zachary | — | 256 | 1 |
| AS33443US | AS-NGENX - Otava, LLC | — | — | 0 |
| AS401389US | OWO-AS - OwO Network, LLC | — | 1 | 1 |
| AS33471US | ARI-CUSTOMERS - Automotive Rentals, Inc. | — | — | 0 |
| AS10725US | GENENTECH - Genentech, Inc. | — | 65.8K | 2 |
| AS33073US | ISC-F-AS - Internet Systems Consortium, Inc. | — | — | 0 |
| AS219383US | LewisAS Andrew Lewis | — | 19 | 4 |
| AS33410US | MANDIANT-US2 - Mandiant, Inc. | — | — | 0 |
| AS206193US | LEONARD-NET Jacob Leonard | — | 257 | 2 |
| AS13669US | VRIS-AS-BLOCK - Verizon Business | — | — | 0 |