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) | 239,137,280 | 232 | 35 | 4,561 | |
| Amazon.com, Inc. | 218,198,272 | 1.91 x 241 | 6 | 21,355 | |
| AT&T Enterprises, LLC | 129,200,645 | 1.06 x 241 | 25 | 3,906 | |
| 4 | Verizon Business | 108,328,192 | 1.5 x 240 | 61 | 6,045 |
| 5 | DoD Network Information Center | 98,293,760 | 1.09 x 233 | 165 | 8,354 |
| 6 | Comcast Cable Communications, LLC | 69,340,928 | 1.56 x 249 | 39 | 4,083 |
| 7 | Microsoft Corporation | 68,083,968 | 1.12 x 239 | 15 | 1,974 |
| 8 | Google LLC | 53,166,960 | 1.14 x 237 | 13 | 5,540 |
| 9 | Apple Inc. | 45,657,088 | 1.02 x 234 | 2 | 1,934 |
| 10 | Level 3 Communications, Inc. | 41,233,354 | 1.16 x 237 | 9 | 4,395 |
| 11 | Cogent Communications | 37,768,192 | 1.85 x 237 | 3 | 5,634 |
| 12 | CenturyLink Communications, LLC | 37,717,760 | 1.02 x 240 | 29 | 3,160 |
| 13 | Charter Communications Inc | 37,597,856 | 1.37 x 239 | 15 | 2,242 |
| 14 | Cox Communications Inc. | 23,619,072 | 1.05 x 237 | 1 | 6,231 |
| 15 | T-Mobile USA, Inc. | 14,830,336 | 1.12 x 236 | 5 | 683 |
| 16 | Charter Communications | 14,620,928 | 1.15 x 239 | 15 | 8,126 |
| 17 | Frontier Communications of America, Inc. | 14,277,632 | 1.07 x 236 | 5 | 1,375 |
| 18 | University of California, San Diego | 12,859,914 | 1.25 x 232 | 1 | 24 |
| 19 | Windstream Communications LLC | 12,748,288 | 1.06 x 241 | 1 | 2,839 |
| 20 | Eli Lilly and Company | 9,734,144 | 0 | 1 | 290 |