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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 |
| AS396307US | SOUTHERNIMPERIAL - Southern Imperial Inc. | 512 | — | 2 |
| AS14848US | DOOSAN-INFORMATION-COMMUNICATIONS-AMERICA - DOOSAN INFORMATION AND COMMUNICATIONS AMERICA, LLC | 512 | — | 2 |
| AS14345US | AFS-8 - AMERIPRISE FINANCIAL SERVICES, LLC | 512 | — | 1 |
| AS7289US | AS-QT - QuantaRa Tech LLC | 512 | 4.7M | 11 |
| AS395518US | A2D-ECBI - A2D, Inc | 512 | 1 | 3 |
| AS394735US | TABUSH - Tabush Consulting Group, Inc. | 512 | — | 1 |
| AS11204US | KPCSD - Kings Park Central School District | 512 | — | 2 |
| AS53374US | NTIU5 - Northwest Tri-County IU 5 | 512 | — | 2 |
| AS401577US | STRATA-ASN-01 - StrataCare Solutions LLC | 512 | — | 2 |
| AS400249US | OC-SANITATION - Orange County Sanitation District | 512 | — | 2 |
| AS22035US | STCASN - SAVE THE CHILDREN | 512 | — | 2 |
| AS3424US | HFMT - National Nuclear Security Administration, Kansas City Plant | 512 | 17 | 4 |
| AS53940US | TMH-14-HQ - Tallahassee Memorial HealthCare Inc. | 512 | — | 2 |
| AS13565US | ORVIS - THE ORVIS COMPANY, INC. | 512 | — | 2 |
| AS46821US | GSTBOCES - Greater Southern Tier (GST) BOCES | 512 | — | 1 |
| AS20073US | RPIPRINT-INC - RPI PRINT, INC. | 512 | — | 2 |
| AS53836US | NGX-ASN02 - NGX Networks | 512 | — | 2 |
| AS26543US | IBM-CMS-RPL - IBM | 512 | — | 1 |
| AS40054US | AVATARA-LLC - Avatara LLC | 512 | — | 1 |
| AS395143US | FMG-AS-1 - Fire Mountain Gems and Beads Inc. | 512 | — | 2 |
| AS397531US | ITS-NETWORK - Iowa Data Centers | 512 | — | 1 |
| AS35963US | GREENVILLE-SPARTANBURG-AIRPORT-COMMISSION - Greenville-Spartanburg Airport Commission | 512 | — | 2 |
| AS3043US | IMS - Amphibian Media Corporation | 512 | 65.5K | 3 |
| AS395655US | TECH-ELECTRONICS-INC-ASN - Tech Electronics, Inc. | 512 | 512 | 4 |
| AS26933US | DIRECTV-SDWAN-LABC-MSDC - DIRECTV, LLC | 512 | — | 2 |
| AS397263US | TECHLOQ-US - Techloq Limited | 512 | 512 | 4 |
| AS396218US | NRA - National Rifle Association of America | 512 | — | 2 |
| AS394041US | HF-RWC - HEARTFLOW INC | 512 | — | 2 |
| AS19972US | AS19972 - CommScope Technologies LLC. | 512 | — | 2 |
| AS399144US | SUHSD-INTERNET-2026 - Sequoia Union High School District | 512 | — | 2 |
| AS27421US | APPLAUSEMA - Applause | 512 | — | 2 |
| AS54982US | RATE - Guaranteed Rate Inc | 512 | — | 2 |
| AS395259US | KIRKLAND-ELLIS-NY - Kirkland & Ellis LLP | 512 | — | 2 |
| AS21553US | ASP-MAIN - Aspirus, Inc. | 512 | — | 2 |
| AS401693US | CANI - Brightpoint | 512 | 19 | 6 |
| AS394607US | SAUSD-ASN-1 - Santa Ana Unified School District | 512 | — | 2 |
| AS33060US | THEPCU-AS-THE-POLICE-CREDIT-UNION - SFPCU | 512 | — | 2 |
| AS53708US | IOVATION-AS15301 - Trans | 512 | — | 2 |
| AS40929US | MOEDOVE-BN - MoeDove | 512 | 25.7K | 81 |
| AS33465US | TSP-NET - Johnson Controls Inc | 512 | — | 2 |
| AS62681US | ACME-WIDGET - Acme Widget LP | 512 | 1 | 3 |
| AS596US | CENTURYLINK-LEGACY-LVLT-596 - Level 3 Parent, LLC | 512 | — | 1 |
| AS27162US | USF-FCU - USF FEDERAL CREDIT UNION | 512 | — | 2 |
| AS26957US | SSG-OHIO-MDC - SSG OHIO | 512 | — | 2 |
| AS11275US | NBH-HOLDINGS-CORPORATION - National Bank Holdings Corporation | 512 | — | 2 |
| AS19412US | HASSER-ENTERPRISES-LLC - Hasser Enterprises LLC | 512 | — | 2 |