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) | 239,242,752 | 1.01 x 232 | 42 | 4,539 | |
| Amazon.com, Inc. | 234,364,928 | 1.93 x 241 | 5 | 23,383 | |
| AT&T Enterprises, LLC | 129,171,973 | 1.06 x 241 | 31 | 3,764 | |
| 4 | Verizon Business | 110,574,080 | 1.03 x 241 | 64 | 6,662 |
| 5 | Comcast Cable Communications, LLC | 95,421,952 | 1.2 x 248 | 38 | 8,024 |
| 6 | DoD Network Information Center | 94,276,864 | 1.1 x 233 | 155 | 8,157 |
| 7 | Microsoft Corporation | 83,764,736 | 1.12 x 239 | 14 | 2,220 |
| 8 | Google LLC | 57,361,776 | 1.23 x 237 | 14 | 5,923 |
| 9 | Apple Inc. | 44,744,704 | 1.02 x 234 | 2 | 2,072 |
| 10 | Level 3 Communications, Inc. | 40,806,600 | 1.13 x 237 | 9 | 4,326 |
| 11 | Charter Communications Inc | 39,499,072 | 1.37 x 239 | 15 | 2,707 |
| 12 | Cogent Communications | 37,694,464 | 1.82 x 237 | 2 | 4,770 |
| 13 | CenturyLink Communications, LLC | 36,686,976 | 1.02 x 240 | 29 | 3,158 |
| 14 | Cox Communications Inc. | 24,995,589 | 1.53 x 238 | 1 | 10,757 |
| 15 | Charter Communications | 15,043,840 | 1.01 x 239 | 14 | 5,102 |
| 16 | T-Mobile USA, Inc. | 14,564,352 | 1.13 x 236 | 5 | 633 |
| 17 | Frontier Communications of America, Inc. | 13,720,066 | 1.06 x 236 | 5 | 1,490 |
| 18 | University of California, San Diego | 12,859,914 | 1.25 x 232 | 1 | 24 |
| 19 | Windstream Communications LLC | 12,425,472 | 1.25 x 241 | 1 | 3,085 |
| 20 | Cablevision Systems Corp. | 11,018,496 | 1.19 x 237 | 2 | 2,798 |