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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 | 3,138 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 211.2M | 21,268 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 113.7M | 639 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.8M | 1,248 |
| AS721US | DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) | 73.1M | 229 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 413 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 49.3M | 3,721 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.7M | 1,955 |
| AS701US | UUNET - Verizon Business | 43.6M | 1,000 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 4,300 |
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.
| AS | Holder | IPv4 ↓ | IPv6 /48 | Prefixes |
|---|---|---|---|---|
| AS749US | DNIC-AS-00749 - United States Department of Defense (DoD) | 227.7M | — | 3,138 |
| AS16509US | AMAZON-02 - Amazon.com, Inc. | 211.2M | 64.4M | 21,268 |
| AS7018US | ATT-INTERNET4 - AT&T Enterprises, LLC | 113.7M | 35.2M | 639 |
| AS8075US | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 81.8M | 9.2M | 1,248 |
| AS721US | DNIC-ASBLK-00721-00726 - United States Department of Defense (DoD) | 73.1M | 131.1K | 229 |
| AS7922US | COMCAST-7922 - Comcast Cable Communications, LLC | 68.3M | 554.2M | 413 |
| AS396982US | GOOGLE-CLOUD-PLATFORM - Google LLC | 49.3M | 1.7M | 3,721 |
| AS714US | APPLE-ENGINEERING - Apple Inc. | 44.7M | 267.7K | 1,955 |
| AS701US | UUNET - Verizon Business | 43.6M | 19.2M | 1,000 |
| AS174US | COGENT-174 - Cogent Communications, LLC | 37.6M | 3.8M | 4,300 |
| AS3356US | LEVEL3 - Level 3 Parent, LLC | 34.4M | 1.3M | 2,113 |
| AS22394US | CELLCO - Verizon Business | 31M | 2.8M | 288 |
| AS209US | CENTURYLINK-US-LEGACY-QWEST - CenturyLink Communications, LLC | 26.2M | 17.1M | 1,629 |
| AS22773US | ASN-CXA-ALL-CCI-22773-RDC - Cox Communications Inc. | 23.6M | 6.4M | 6,258 |
| AS14618US | AMAZON-AES - Amazon.com, Inc. | 22.9M | 255.1K | 1,930 |
| AS6167US | CELLCO-PART - Verizon Business | 18M | 16.8K | 3,814 |
| AS21928US | T-MOBILE-AS21928 - T-Mobile USA, Inc. | 14M | 1.2M | 540 |
| AS20115US | CHARTER-20115 - Charter Communications LLC | 13.6M | 7.9M | 4,608 |
| AS5650US | FRONTIER-FRTR - Frontier Communications of America, Inc. | 13.1M | 1.1M | 1,023 |
| AS7377US | UCSD - University of California, San Diego | 12.9M | 81.9K | 20 |
| AS7029US | WINDSTREAM - Windstream Communications LLC | 12.4M | 38.2M | 3,031 |
| AS10796US | TWC-10796-MIDWEST - Charter Communications Inc | 9.9M | 1.4M | 664 |
| AS3257US | GTT-BACKBONE GTT Communications Inc. | 9.2M | 6.2M | 1,404 |
| AS4249US | LILLY-AS - Eli Lilly and Company | 9.2M | — | 269 |
| AS56US | DNIC-AS-00056 - United States Department of Defense (DoD) | 8.3M | — | 927 |
| AS20001US | TWC-20001-PACWEST - Charter Communications Inc | 7.9M | 1.6M | 607 |
| AS3561US | CENTURYLINK-LEGACY-SAVVIS - CenturyLink Communications, LLC | 7.4M | 9.1 | 646 |
| AS6128US | CABLE-NET-1 - Cablevision Systems Corp. | 7.2M | 2.4M | 89 |
| AS20057US | ATT-MOBILITY-LLC-AS20057 - AT&T Enterprises, LLC | 7.2M | 60.1K | 1,630 |
| AS19108US | SUDDENLINK-COMMUNICATIONS - Optimum | 7M | 114.8K | 437 |
| AS2828US | XO-AS15 - Verizon Business | 6.7M | 65.5K | 86 |
| AS33363US | BHN-33363 - Charter Communications, Inc | 6.3M | 1.4M | 497 |
| AS2914US | NTT-DATA-2914 - NTT America, Inc. | 6.3M | 460.8K | 1,160 |
| AS1540US | DNIC-ASBLK-01534-01546 - Headquarters, USAISC | 6.1M | 30 | 911 |
| AS11427US | TWC-11427-TEXAS - Charter Communications Inc | 5.9M | 3.5M | 421 |
| AS702US | UUNET - Verizon Business | 5.9M | 10M | 466 |
| AS31898US | ORACLE-BMC-31898 - Oracle Corporation | 5.5M | 869.6K | 3,237 |
| AS3549US | LVLT-3549 - Level 3 Parent, LLC | 5.4M | 999.5K | 833 |
| AS6079US | RCN-AS - RCN | 5.2M | 19.7M | 2,230 |
| AS11426US | TWC-11426-CAROLINAS - Charter Communications Inc | 4.7M | 1.3M | 220 |
| AS306US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 4.7M | 819 | 332 |
| AS6389US | BELLSOUTH-NET-BLK - AT&T Enterprises, LLC | 4.5M | — | 54 |
| AS16625US | AKAMAI-AS - Akamai Technologies, Inc. | 4.4M | 98.3K | 2,082 |
| AS11351US | TWC-11351-NORTHEAST - Charter Communications Inc | 4.3M | 1.2M | 142 |
| AS11003US | PANDG - The Procter and Gamble Company | 4.1M | — | 39 |
| AS36351US | SOFTLAYER - IBM Cloud | 3.8M | 87.6K | 412 |
| AS16591US | GOOGLE-FIBER - Google Fiber Inc. | 3.5M | 131.1K | 325 |
| AS367US | DNIC-ASBLK-00306-00371 - United States Department of Defense (DoD) | 3.3M | 34 | 1,344 |
| AS15169US | GOOGLE - Google LLC | 3.3M | 721.9K | 1,199 |
| AS4155US | USDA-1 - USDA | 3.2M | 17.8M | 25 |