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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 | 3,134 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 218.2M | 25,525 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 642 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.7M | 1,309 |
| 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.
32,245 autonomous systems registered to United States. Click an AS for detail.
| 73M |
| 232 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 437 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 51.6M | 3,898 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.8M | 2,000 |
| AS701US | UUNET - Verizon Business | 43.6M | 991 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,357 |
| 512 |
| 2 |
| 4 |
| AS32428US | BELZ-INVESTCO - BELZ ENTERPRISES | 512 | — | 2 |
| AS399712US | ENTEFY-ASN - Entefy Inc. | 512 | — | 2 |
| AS11248US | MSTS-NET - TreviPay | 512 | — | 2 |
| AS395523US | IGSENERGY - IGS Energy | 512 | — | 2 |
| AS30484US | PAHOUSEGOP - Pennsylvania House of Representatives, Republican IT Services | 512 | — | 2 |
| AS36811US | WIZTECH-INTERNET - Wiztech Internet | 512 | 1 | 3 |
| AS22713US | CAC-HQ2 - Credit Acceptance Corporation | 512 | — | 1 |
| AS396369US | CITYOFLUBBOCKTX - City of Lubbock | 512 | — | 2 |
| AS19480US | CPL - CHICAGO PUBLIC LIBRARY | 512 | — | 2 |
| AS398322US | ESFCU-01 - Educational Systems Federal Credit Union | 512 | — | 2 |
| AS395860US | NETBLK-CLARIOS - Clarios | 512 | — | 2 |
| AS53320US | INTERACTIVE-INTELLIGENCE-INC - Genesys Telecommunications Laboratories,Inc. | 512 | — | 2 |
| AS32949US | UNITED-REFRIGERATION - UNITED REFRIGERATION INC | 512 | — | 2 |
| AS19188US | SJ-ARMANINO-01 - Armanino LLP | 512 | — | 2 |
| AS47094US | ITRON-6-47094 - Itron | 512 | — | 2 |
| AS17167US | MCSNOC01 - Microchip Computer Solutions, Inc. | 512 | — | 2 |
| AS40604US | N2N-TECHNOLOGIES - N2N Technologies, Inc. | 512 | — | 2 |
| AS402127US | TAKOYAKI-NET - Project Takoyaki Technologies | 512 | — | 2 |
| AS18679US | I4A-NETWORK - internet4associations | 512 | — | 2 |
| AS397292US | GIGABEAM-INTERNET - Symplified Technologies LLC | 512 | — | 1 |
| AS395324US | NETBLK-CBOCS-HO-NET - Cracker Barrel Old Country Store, Inc. | 512 | — | 2 |
| AS63047US | KMHA - Konica Minolta Healthcare Americas, Inc. | 512 | — | 2 |
| AS26176US | AJA - AJA Video Systems, Inc. | 512 | — | 2 |
| AS32946US | RPU-1892 - Rochester Public Utilities | 512 | — | 2 |
| AS26450US | CTDI-WC - CTDI | 512 | 275 | 22 |
| AS27203US | TRIHEALTH-1 - Trihealth | 512 | — | 2 |
| AS394850US | CITY-OF-CAPE-CORAL - City of Cape Coral | 512 | — | 2 |
| AS33402US | BULLITT-COMMUNICATIONS - Bullitt Communications | 512 | 4.1K | 2 |
| AS36010US | RBSTARNET1 - Randolph-Brooks Federal Credit Union | 512 | — | 2 |
| AS395279US | MICLOUD-US - Mitel Networks, Inc. | 512 | — | 2 |
| AS33726US | GENEVACOLLEGE-AS - GENEVA COLLEGE | 512 | — | 1 |
| AS400781US | XTC-NA-ASN-01 - XenTegra Connect | 512 | — | 2 |
| AS32041US | UL - Underwriters Laboratories | 512 | — | 2 |
| AS397155US | BOK-CENTER - BOK Center | 512 | — | 2 |
| AS18533US | AAAWA-3605 - AAA Washington | 512 | — | 1 |
| AS19364US | SEBAGO-FIBER - Sebago Fiber & Wifi, LLC | 512 | 4.1K | 3 |
| AS16777US | NET-PROVPHP - Providence Health Plan | 512 | — | 2 |
| AS35974US | QTS-EEM - Quality Technology Services, LLC | 512 | — | 2 |
| AS400695US | APOG-FAYETTEVILLE - Apogee Telecom Inc. | 512 | — | 1 |
| AS394761US | PTS-MAIN - Princeton Theological Seminary | 512 | — | 2 |
| AS7455US | MOTO-INT1-AS - Motorists Mutual Insurance Company | 512 | — | 2 |
| AS14207US | CSG-OD2 - CSG Systems Inc. | 512 | — | 2 |
| AS13710US | SYSTEMS-METHODS - Systems & Methods, Inc. | 512 | — | 1 |
| AS22588US | DOMIN-AS - DOMINION ENTERPRISES | 512 | — | 2 |
| AS394499US | DIMENSIONAL - Dimensional Fund Advisors | 512 | — | 2 |
| AS46460US | KARMAK-NET - Karmak, Inc. | 512 | — | 1 |