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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. | 218M | 24,346 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 117.3M | 644 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.6M | 1,303 |
| 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.
32,168 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 | 3,885 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.8M | 1,996 |
| AS701US | UUNET - Verizon Business | 43.6M | 994 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,357 |
| 512 |
| — |
| 2 |
| AS214300US | Layer4-Group Layer 4 Group LLC | 512 | — | 2 |
| AS198905US | DIGICERT_QUOVADIS DigiCert, Inc. | 512 | — | 2 |
| AS30435US | H9K-1 - Hal 9000 LLC | 512 | — | 2 |
| AS33555US | STONEMARCHE - Stonemarche Network CoOp. | 512 | — | 2 |
| AS30572US | NYCB-NEW-YORK-COMMUNITY-BANCORP-INC - New York Community Bancorp Inc. | 512 | — | 2 |
| AS27279US | ASCENSION-MDBAL - Ascension Technologies | 512 | — | 2 |
| AS397975US | BRITEFISH-01 - Realnets | 512 | — | 2 |
| AS395980US | COMCAST-MES - Comcast Cable Communications, LLC | 512 | — | 2 |
| AS396939US | AANIIN - Fond du Lac Band of Lake Superior Chippewa | 512 | — | 1 |
| AS54649US | ADC-ATLANTA - AutomationDirect.com, Inc. | 512 | — | 1 |
| AS399419US | PSI-CORE-OH1 - Prime Servers, Inc. | 512 | — | 2 |
| AS395135US | BTI-COMMUNICATIONS - BTI Communications | 512 | — | 1 |
| AS397326US | SFN-ASN - South Front Networks | 512 | 256 | 3 |
| AS46259US | CTDN-AS - Donor Network West | 512 | — | 2 |
| AS402551US | PIEDMON-ASN - Piedmont | 512 | — | 2 |
| AS54500US | 18779 - EGIHosting | 512 | — | 2 |
| AS39971US | BELL-IT-SERVICES - Bell IT Services, Inc. | 512 | 1 | 3 |
| AS396320US | MACORG - Metropolitan Airports Commission | 512 | 16 | 2 |
| AS5036US | WCA - Whalley Computer Associates | 512 | — | 2 |
| AS10764US | STARTAP - University of Illinois | 512 | — | 1 |
| AS394742US | INU - DP Solutions, Inc. | 512 | — | 2 |
| AS393697US | HUBUSILEGVDCSUB - Hub International | 512 | — | 2 |
| AS398883US | WINGMAN-IT-SERVICES - Wingman IT Services | 512 | 16 | 3 |
| AS18669US | BSEC-CA-1 - Bal Seal Engineering Co. Inc. | 512 | — | 2 |
| AS14718US | LENEXA-DR - NATIONAL INDEMNITY COMPANY | 512 | — | 1 |
| AS11449US | INTERACTIVEBROKERS - Interactive Brokers LLC | 512 | — | 2 |
| AS23209US | VHDA20011260123220 - Virginia Housing Development Authority | 512 | — | 2 |
| AS399717US | NU - Newman University, Inc. | 512 | — | 2 |
| AS29905US | BAIN-CAPITAL - Bain Capital, LP | 512 | — | 2 |
| AS401869US | SSL-GLOBAL - Shine Summit LLC | 512 | — | 2 |
| AS1445US | MILLIMAN - Milliman, Inc. | 512 | — | 1 |
| AS395126US | BECKS - Beck's Superior Hybrids, Inc. | 512 | — | 2 |
| AS63325US | CARRIAGESERVICESAS - Carriage Services, Inc. | 512 | — | 2 |
| AS398011US | LYNDENDOOR - Lynden Door, Inc. | 512 | — | 2 |
| AS14045US | CHANGEHEALTHCARE - UnitedHealth Group Incorporated | 512 | — | 2 |
| AS40632US | FGLIFE-COLO1 - Fidelity & Guaranty Life | 512 | — | 2 |
| AS393518US | CLAIMREMEDI-AS - ClaimRemedi, Inc. | 512 | — | 2 |
| AS393485US | TIFFANYCO - Tiffany and Company | 512 | — | 2 |
| AS46569US | WALSH-COLLEGE - Walsh College of Accountancy and Business Administration | 512 | — | 2 |
| AS27523US | KAWAII-NETWORKS - Kawaii Networks LLC | 512 | 518 | 10 |
| AS36598US | RADIANT-SOLUTIONS - Radiant Solution Providers | 512 | 4.1K | 2 |
| AS40263US | BCS-1 - Bear Cloud Solutions, Inc. | 512 | 1 | 3 |
| AS395188US | SALADASN-01 - US FOODS, INC. | 512 | — | 2 |
| AS54185US | PRMI-CORP-AS01 - PRIMARY RESIDENTIAL MORTGAGE | 512 | — | 2 |
| AS40427US | IRONPORT-SYSTEMS-CI365 - Cisco Systems Ironport Division | 512 | — | 2 |
| AS18758US | ADRECOM - Adrecom | 512 | — | 2 |