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) | 238,986,240 | 1.01 x 232 | 41 | 4,532 | |
| Amazon.com, Inc. | 230,116,352 | 1.93 x 241 | 5 | 22,676 | |
| AT&T Enterprises, LLC | 129,299,717 | 1.06 x 241 | 29 | 3,926 | |
| 4 | Comcast Cable Communications, LLC | 121,870,336 | 1.2 x 248 | 36 | 8,780 |
| 5 | Verizon Business | 110,612,480 | 1.03 x 241 | 64 | 6,677 |
| 6 | DoD Network Information Center | 95,886,592 | 1.1 x 233 | 155 | 8,577 |
| 7 | Microsoft Corporation | 68,376,832 | 1.12 x 239 | 15 | 2,085 |
| 8 | Google LLC | 55,576,176 | 1.23 x 237 | 13 | 5,718 |
| 9 | Apple Inc. | 45,792,768 | 1.02 x 234 | 2 | 2,066 |
| 10 | Level 3 Communications, Inc. | 41,341,484 | 1.13 x 237 | 10 | 4,391 |
| 11 | Charter Communications Inc | 39,576,504 | 1.37 x 239 | 15 | 2,743 |
| 12 | Cogent Communications | 37,739,264 | 1.82 x 237 | 2 | 5,838 |
| 13 | CenturyLink Communications, LLC | 37,228,416 | 1.02 x 240 | 29 | 3,145 |
| 14 | Cox Communications Inc. | 25,115,648 | 1.53 x 238 | 1 | 10,856 |
| 15 | Charter Communications | 16,689,664 | 1.15 x 239 | 15 | 7,472 |
| 16 | Frontier Communications of America, Inc. | 15,399,168 | 1.06 x 236 | 5 | 1,453 |
| 17 | T-Mobile USA, Inc. | 14,627,328 | 1.13 x 236 | 5 | 634 |
| 18 | University of California, San Diego | 12,859,914 | 1.25 x 232 | 1 | 24 |
| 19 | Windstream Communications LLC | 12,410,624 | 1.17 x 241 | 1 | 3,003 |
| 20 | Eli Lilly and Company | 9,214,208 | 0 | 1 | 280 |