List of the top 20 organizations with the largest IP allocations in United States
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| United States Department of Defense (DoD) | 238,920,704 | 1.01 x 232 | 41 | 4,518 | |
| Amazon.com, Inc. | 229,009,408 | 1.92 x 241 | 5 | 22,109 | |
| AT&T Enterprises, LLC | 129,212,165 | 1.06 x 241 | 29 | 3,900 | |
| 4 | Verizon Business | 109,957,376 | 1.5 x 240 | 64 | 6,633 |
| 5 | DoD Network Information Center | 95,981,568 | 1.09 x 233 | 155 | 8,221 |
| 6 | Comcast Cable Communications, LLC | 68,714,240 | 1.06 x 249 | 36 | 4,042 |
| 7 | Microsoft Corporation | 68,109,056 | 1.12 x 239 | 15 | 2,049 |
| 8 | Google LLC | 55,314,288 | 1.23 x 237 | 13 | 5,729 |
| 9 | Apple Inc. | 45,765,632 | 1.02 x 234 | 2 | 2,035 |
| 10 | Level 3 Communications, Inc. | 41,216,164 | 1.14 x 237 | 10 | 4,370 |
| 11 | Charter Communications Inc | 39,575,224 | 1.37 x 239 | 15 | 2,741 |
| 12 | Cogent Communications | 37,705,472 | 1.82 x 237 | 2 | 5,636 |
| 13 | CenturyLink Communications, LLC | 37,031,040 | 1.02 x 240 | 29 | 3,138 |
| 14 | Cox Communications Inc. | 25,101,824 | 1.06 x 237 | 1 | 10,822 |
| 15 | Charter Communications | 16,516,864 | 1.15 x 239 | 15 | 7,291 |
| 16 | T-Mobile USA, Inc. | 14,627,328 | 1.13 x 236 | 5 | 632 |
| 17 | Frontier Communications of America, Inc. | 14,320,128 | 1.07 x 236 | 5 | 1,412 |
| 18 | University of California, San Diego | 12,859,914 | 1.25 x 232 | 1 | 24 |
| 19 | Windstream Communications LLC | 12,384,512 | 1.35 x 241 | 1 | 2,883 |
| 20 | Eli Lilly and Company | 9,214,208 | 0 | 1 | 280 |