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) | 239,455,232 | 232 | 35 | 4,646 | |
| Amazon.com, Inc. | 211,326,464 | 1.94 x 241 | 6 | 21,603 | |
| AT&T Enterprises, LLC | 129,235,717 | 1.1 x 241 | 26 | 3,957 | |
| 4 | Verizon Business | 108,325,120 | 1.49 x 240 | 60 | 6,106 |
| 5 | DoD Network Information Center | 98,366,720 | 1.09 x 233 | 165 | 8,130 |
| 6 | Comcast Cable Communications, LLC | 68,691,200 | 1.56 x 249 | 37 | 4,158 |
| 7 | Microsoft Corporation | 68,114,176 | 1.12 x 239 | 15 | 1,951 |
| 8 | Google LLC | 53,066,352 | 1.14 x 237 | 13 | 5,491 |
| 9 | Apple Inc. | 45,627,136 | 1.02 x 234 | 2 | 1,920 |
| 10 | Level 3 Communications, Inc. | 41,227,090 | 1.16 x 237 | 9 | 4,365 |
| 11 | CenturyLink Communications, LLC | 37,921,024 | 1.02 x 240 | 30 | 3,225 |
| 12 | Charter Communications Inc | 37,734,240 | 1.37 x 239 | 15 | 2,223 |
| 13 | Cogent Communications | 37,487,616 | 1.35 x 237 | 3 | 5,003 |
| 14 | Cox Communications Inc. | 23,602,432 | 1.05 x 237 | 1 | 6,212 |
| 15 | T-Mobile USA, Inc. | 14,822,912 | 1.12 x 236 | 5 | 681 |
| 16 | Charter Communications | 14,620,416 | 1.15 x 239 | 15 | 8,014 |
| 17 | Frontier Communications of America, Inc. | 14,230,528 | 1.07 x 236 | 5 | 1,335 |
| 18 | University of California, San Diego | 12,859,914 | 1.25 x 232 | 1 | 24 |
| 19 | Windstream Communications LLC | 12,322,560 | 1.85 x 240 | 2 | 2,918 |
| 20 | Eli Lilly and Company | 9,832,448 | 0 | 1 | 292 |