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) | 239,135,744 | 232 | 35 | 4,555 | |
| Amazon.com, Inc. | 215,312,384 | 1.91 x 241 | 6 | 21,029 | |
| AT&T Enterprises, LLC | 129,212,165 | 1.06 x 241 | 25 | 3,879 | |
| 4 | Verizon Business | 108,276,224 | 1.5 x 240 | 60 | 6,041 |
| 5 | DoD Network Information Center | 98,222,592 | 1.09 x 233 | 165 | 8,203 |
| 6 | Comcast Cable Communications, LLC | 68,816,640 | 1.56 x 249 | 38 | 4,087 |
| 7 | Microsoft Corporation | 68,079,872 | 1.12 x 239 | 15 | 1,965 |
| 8 | Google LLC | 53,140,592 | 1.14 x 237 | 13 | 5,512 |
| 9 | Apple Inc. | 45,623,808 | 1.02 x 234 | 2 | 1,913 |
| 10 | Level 3 Communications, Inc. | 41,232,418 | 1.16 x 237 | 9 | 4,383 |
| 11 | CenturyLink Communications, LLC | 37,776,896 | 1.02 x 240 | 30 | 3,199 |
| 12 | Cogent Communications | 37,603,840 | 1.35 x 237 | 3 | 5,361 |
| 13 | Charter Communications Inc | 37,595,808 | 1.37 x 239 | 15 | 2,235 |
| 14 | Cox Communications Inc. | 23,608,832 | 1.05 x 237 | 1 | 6,200 |
| 15 | T-Mobile USA, Inc. | 14,828,544 | 1.12 x 236 | 5 | 679 |
| 16 | Charter Communications | 14,617,856 | 1.15 x 239 | 15 | 8,083 |
| 17 | Frontier Communications of America, Inc. | 14,265,856 | 1.07 x 236 | 5 | 1,358 |
| 18 | University of California, San Diego | 12,859,914 | 1.25 x 232 | 1 | 24 |
| 19 | Windstream Communications LLC | 12,555,776 | 1.06 x 241 | 2 | 2,789 |
| 20 | Eli Lilly and Company | 9,734,144 | 0 | 1 | 290 |