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) | 239,242,240 | 1.01 x 232 | 42 | 4,537 | |
| Amazon.com, Inc. | 234,380,032 | 1.93 x 241 | 5 | 23,474 | |
| AT&T Enterprises, LLC | 129,172,485 | 1.06 x 241 | 31 | 3,768 | |
| 4 | Verizon Business | 110,587,392 | 1.03 x 241 | 64 | 6,669 |
| 5 | Comcast Cable Communications, LLC | 95,443,200 | 1.2 x 248 | 38 | 8,040 |
| 6 | DoD Network Information Center | 94,071,808 | 1.1 x 233 | 155 | 8,142 |
| 7 | Microsoft Corporation | 83,765,760 | 1.12 x 239 | 14 | 2,221 |
| 8 | Google LLC | 57,349,488 | 1.23 x 237 | 14 | 5,924 |
| 9 | Apple Inc. | 44,744,960 | 1.02 x 234 | 2 | 2,070 |
| 10 | Level 3 Communications, Inc. | 40,807,400 | 1.13 x 237 | 9 | 4,328 |
| 11 | Charter Communications Inc | 39,500,352 | 1.37 x 239 | 15 | 2,712 |
| 12 | Cogent Communications | 37,693,184 | 1.82 x 237 | 2 | 4,772 |
| 13 | CenturyLink Communications, LLC | 36,686,976 | 1.02 x 240 | 29 | 3,158 |
| 14 | Cox Communications Inc. | 25,039,365 | 1.53 x 238 | 1 | 10,766 |
| 15 | Charter Communications | 15,060,480 | 1.01 x 239 | 14 | 5,110 |
| 16 | T-Mobile USA, Inc. | 14,564,352 | 1.13 x 236 | 5 | 633 |
| 17 | Frontier Communications of America, Inc. | 13,732,098 | 1.06 x 236 | 5 | 1,504 |
| 18 | University of California, San Diego | 12,859,914 | 1.25 x 232 | 1 | 24 |
| 19 | Windstream Communications LLC | 12,398,848 | 1.25 x 241 | 1 | 3,080 |
| 20 | Cablevision Systems Corp. | 11,020,032 | 1.19 x 237 | 2 | 2,800 |