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How United States ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
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. | 218.1M | 24,630 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 644 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.6M | 1,307 |
| 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.
32,219 autonomous systems registered to United States. Click an AS for detail.
| 73.1M |
| 233 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 437 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 51.5M | 3,891 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.8M | 2,002 |
| AS701US | UUNET - Verizon Business | 43.6M | 993 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,357 |
| SRH-ASN - Scottish Rite Hospital for Children |
| 256 |
| — |
| 1 |
| AS53888US | RPA-ASN - RUBIN POSTAER AND ASSOCIATES | 256 | — | 1 |
| AS18437US | PITT-OHIO-EXPRESS-AS - Pitt-Ohio Express, LLC. | 256 | 3 | 4 |
| AS40240US | FCBOE - Fayette County Board of Education | 256 | — | 1 |
| AS400855US | AVD-PRINCETON - Advantage Voice & Data, LLC | 256 | — | 1 |
| AS394552US | TRSTPT-AS - TrustPoint International | 256 | — | 1 |
| AS54367US | RILIN - State of Rhode Island General Assembly | 256 | — | 1 |
| AS36340US | CITY-OF-TOLEDO - City of Toledo | 256 | — | 1 |
| AS40118US | THIRD-POINT-LLC - Third Point LLC | 256 | — | 1 |
| AS32118US | AS-SMARTHEALTH - Smart Practice | 256 | — | 1 |
| AS395427US | PH-LSK-003 - Parker Hannifin Corporation | 256 | — | 1 |
| AS32627US | BIDS-TRADING - BIDS Trading L.P. | 256 | — | 1 |
| AS394257US | SPRINGFIELDCLINIC - Springfield Clinic, LLP | 256 | — | 1 |
| AS20387US | SHAKECLOUD - Shake Cloud Inc | 256 | — | 1 |
| AS916US | STALWART-ASN-01 - Stalwart Wireless | 256 | 256 | 2 |
| AS401977US | SNC-TUOL - Sierra Nevada Communications | 256 | — | 1 |
| AS398062US | SPTA-1-AS-1 - Southeastern Pennsylvania Transportation Authority | 256 | — | 1 |
| AS56773US | mox Mox Networks, LLC | 256 | — | 1 |
| AS26098US | GAA - Greensboro Auto Auction | 256 | — | 1 |
| AS401492US | WINDING-RIVERS-LIBRARY-SYSTEM - Winding Rivers Library System | 256 | — | 1 |
| AS17002US | AVISTA-CAPITAL - Avista Capital, Inc. | 256 | — | 1 |
| AS399694US | BRTNBB-TX01 - BRIGHTON BROADBAND INC. | 256 | 65.5K | 2 |
| AS197137US | YUNHU-NETWORKS-LLC YUNHU NETWORKS LLC | 256 | 4 | 5 |
| AS63120US | CLARKS-AMERICAS - C & J Clark America, Inc. | 256 | — | 1 |
| AS398902US | CASS-REGIONAL - Cass Regional Medical Center | 256 | — | 1 |
| AS395969US | IQVIA-BRAMPTON - IQVIA Holdings Inc | 256 | — | 1 |
| AS23359US | WLNYASN - WLNY-TV Inc | 256 | — | 1 |
| AS5638US | BREWER-SCIENCE - Brewer Science | 256 | — | 1 |
| AS395296US | MSFA - MSFA | 256 | — | 1 |
| AS6302US | AGP-AS1 - AG PROCESSING INC., A COOPERATIVE | 256 | — | 1 |
| AS39981US | STONE-POINT-CAPITAL-PUBLIC - Stone Point Capital LLC | 256 | — | 1 |
| AS21566US | HOTAISLE - Hot Aisle Inc. | 256 | — | 1 |
| AS400134US | BON-ASN-01 - Balance of Nature | 256 | — | 1 |
| AS63379US | MNSCA - Sun Country Airlines | 256 | — | 1 |
| AS394650US | CPG-ASN1 - TransCanada Pipelines Limited | 256 | — | 1 |
| AS33407US | STRAYERUNVERSITY - Strayer University | 256 | — | 1 |
| AS402769US | PAUL - 13 | 256 | — | 1 |
| AS401111US | WAVEPOINT - Wavepoint LLC | 256 | 256 | 2 |
| AS399551US | MILLENNIUM-SYSTEMS-INC - Millennium Systems, Inc. | 256 | — | 1 |
| AS394891US | SEAPORT-GLAN - Commonwealth Flats Development Hotel Corp. | 256 | — | 1 |
| AS399935US | HAYASHIMO - Hayashimo LLC | 256 | 1 | 2 |
| AS6629US | NOAA-SILVERSPRING - National Oceanic and Atmospheric Administration | 256 | 1K | 2 |
| AS15329US | DENO - Deno | 256 | 1 | 2 |
| AS25639US | CENTERTECH - The Center for Rural Development, Inc. | 256 | 1 | 2 |
| AS16850US | SMITH-WESSON - Smith & Wesson | 256 | — | 1 |
| AS22236US | UNITEDBANCORP - The Citizens Savings Bank | 256 | — | 1 |
| AS14355US | IWI-TG-FW - Interstate Warehousing, Inc. | 256 | — | 1 |