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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 | 3,140 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 211.2M | 21,178 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 113.7M | 639 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.8M | 1,241 |
| 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.
31,994 autonomous systems registered to United States. Click an AS for detail.
| 73.1M |
| 229 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 373 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 49.3M | 3,667 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.7M | 1,946 |
| AS701US | UUNET - Verizon Business | 43.6M | 999 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,371 |
| 512 |
| — |
| 2 |
| AS40578US | VANGUARDHEALTHSYSTEMS-PHAZ - Vanguard Health Systems | 512 | — | 2 |
| AS968US | PACKETFRAME - Packetframe | 512 | — | 2 |
| AS394199US | CEPC-AS1 - Central Electric Power Cooperative | 512 | — | 2 |
| AS14092US | AFS-9 - AMERIPRISE FINANCIAL SERVICES, LLC | 512 | — | 1 |
| AS398001US | TGNA-WZDX - TEGNA Inc. | 512 | — | 2 |
| AS32837US | WCL-50-AS - Williams & Connolly, LLP | 512 | — | 2 |
| AS13452US | AS-IL1-DIA - Guggenheim Services LLC | 512 | — | 2 |
| AS32831US | RPCI-AS - Roswell Park Cancer Institute | 512 | — | 2 |
| AS35963US | GREENVILLE-SPARTANBURG-AIRPORT-COMMISSION - Greenville-Spartanburg Airport Commission | 512 | — | 2 |
| AS6488US | DS6488-0 - AMUG | 512 | — | 2 |
| AS22035US | STCASN - SAVE THE CHILDREN | 512 | — | 2 |
| AS2695US | RJRT01-TOB1 - RJ Reynolds Tobacco Company | 512 | — | 2 |
| AS5958US | DNIC-ASBLK-05800-06055 - United States Department of Defense (DoD) | 512 | — | 2 |
| AS33316US | AV-INC - AeroVironment, Inc. | 512 | — | 2 |
| AS53562US | DRIVETIME - DriveTime | 512 | — | 2 |
| AS400734US | LTI - Link Technologies, Inc. | 512 | 16 | 3 |
| AS5651US | GMLL-AS - GMLL CAPITAL MANAGEMENT LLC | 512 | — | 2 |
| AS30586US | BOS - Bank Of Springfield | 512 | — | 2 |
| AS596US | CENTURYLINK-LEGACY-LVLT-596 - Level 3 Parent, LLC | 512 | — | 1 |
| AS393663US | ACUMENT - Acument Global Technologies, Inc. | 512 | — | 2 |
| AS11466US | ANDREWS-FEDERAL1 - Andrews Federal Credit Union | 512 | — | 2 |
| AS27418US | OOW-INC - OUTOFWALL INC. | 512 | 16 | 18 |
| AS396861US | PROPATH - ProPath Services, LLC | 512 | — | 2 |
| AS47015US | SHH-SJH - Sacred Heart Hospital | 512 | — | 2 |
| AS401294US | ROOFSOFT - RoofSoft LLC | 512 | — | 2 |
| AS17391US | CPWR-DTW-ASN01 - BMC Software, Inc. | 512 | — | 2 |
| AS20073US | RPIPRINT-INC - RPI PRINT, INC. | 512 | — | 2 |
| AS33492US | AS33492 - EvergreenHealth | 512 | — | 1 |
| AS33629US | NKU-AS1 - Northern Kentucky University | 512 | — | 2 |
| AS5642US | ASHDOWN-TECH - Ashdown Technologies, Inc. | 512 | — | 2 |
| AS20204US | NOVOLINK-HOUSTON - NovoLink Communications, Inc. - Houston | 512 | — | 2 |
| AS5666US | NET-CPRK - Speedcast Communications, Inc | 512 | — | 2 |
| AS395372US | FIRSTCOMMANDFINANCIALSERVICES - First Command Financial Services, Inc. | 512 | — | 2 |
| AS397900US | FIRSTDAY - FirstDay Foundation | 512 | — | 2 |
| AS16986US | CSM-AS - City of Santa Monica | 512 | — | 2 |
| AS396947US | SMWC-ASN-1 - Saint Mary of the Woods College | 512 | — | 2 |
| AS399144US | SUHSD-INTERNET-2026 - Sequoia Union High School District | 512 | — | 2 |
| AS395774US | ESVC-ASN - Eastern Shore Communications, LLC | 512 | 65.5K | 3 |
| AS397519US | GO-DADDY-COM-LLC - GoDaddy.com, LLC | 512 | 2 | 4 |
| AS393401US | HAYSMED - Hays Medical Center | 512 | — | 2 |
| AS21654US | APOG-EHC - Apogee Telecom Inc. | 512 | — | 2 |
| AS46821US | GSTBOCES - Greater Southern Tier (GST) BOCES | 512 | — | 1 |
| AS40908US | IES - Integrated Electrical Services, Inc (IES) | 512 | — | 2 |
| AS20109US | DC09 - DC09, LLC. | 512 | — | 2 |
| AS398891US | QUAD9-AS-2 - Quad9 | 512 | 2 | 4 |
| AS35978US | KINETIC-1-2009 - GPB Communications Inc | 512 | — | 2 |