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) | 238,921,728 | 1.01 x 232 | 41 | 4,520 | |
| Amazon.com, Inc. | 229,716,480 | 1.92 x 241 | 5 | 22,239 | |
| AT&T Enterprises, LLC | 129,278,725 | 1.06 x 241 | 29 | 3,903 | |
| 4 | Verizon Business | 109,559,040 | 1.5 x 240 | 63 | 6,645 |
| 5 | DoD Network Information Center | 96,106,240 | 1.1 x 233 | 155 | 8,360 |
| 6 | Comcast Cable Communications, LLC | 68,717,824 | 1.06 x 249 | 36 | 4,039 |
| 7 | Microsoft Corporation | 68,106,240 | 1.12 x 239 | 15 | 2,053 |
| 8 | Google LLC | 55,316,848 | 1.23 x 237 | 13 | 5,737 |
| 9 | Apple Inc. | 45,765,888 | 1.02 x 234 | 2 | 2,036 |
| 10 | Level 3 Communications, Inc. | 41,227,556 | 1.14 x 237 | 10 | 4,386 |
| 11 | Charter Communications Inc | 39,576,504 | 1.37 x 239 | 15 | 2,745 |
| 12 | Cogent Communications | 37,756,672 | 1.82 x 237 | 2 | 5,756 |
| 13 | CenturyLink Communications, LLC | 37,032,192 | 1.02 x 240 | 29 | 3,143 |
| 14 | Cox Communications Inc. | 25,102,592 | 1.06 x 237 | 1 | 10,823 |
| 15 | Charter Communications | 16,572,672 | 1.15 x 239 | 15 | 7,321 |
| 16 | T-Mobile USA, Inc. | 14,627,072 | 1.13 x 236 | 5 | 631 |
| 17 | Frontier Communications of America, Inc. | 14,330,112 | 1.06 x 236 | 5 | 1,422 |
| 18 | University of California, San Diego | 12,859,914 | 1.25 x 232 | 1 | 24 |
| 19 | Windstream Communications LLC | 12,387,072 | 1.36 x 241 | 1 | 2,891 |
| 20 | Eli Lilly and Company | 9,214,208 | 0 | 1 | 280 |