List of the top 20 organizations with the largest IP allocations in United States
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| AT&T Services, Inc. | 122,029,569 | 1.23 x 241 | 10 | 2,173 | |
| DoD Network Information Center | 99,704,576 | 233 | 221 | 8,207 | |
| Global Resource Systems, LLC | 94,691,328 | 0 | 1 | 614 | |
| 4 | Comcast Cable Communications, LLC | 80,311,300 | 1.03 x 245 | 41 | 4,720 |
| 5 | MCI Communications Services, Inc. d/b/a Verizon Business | 64,853,120 | 1.27 x 240 | 36 | 22,383 |
| 6 | Amazon.com, Inc. | 59,862,016 | 1.4 x 236 | 4 | 7,187 |
| 7 | Level 3 Communications, Inc. | 48,936,058 | 1.93 x 237 | 15 | 4,224 |
| 8 | Apple Inc. | 46,128,896 | 1.03 x 234 | 3 | 1,340 |
| 9 | Cellco Partnership DBA Verizon Wireless | 43,541,504 | 1.32 x 237 | 4 | 2,360 |
| 10 | CenturyLink Communications, LLC | 43,397,600 | 1.05 x 240 | 43 | 4,858 |
| 11 | Microsoft Corporation | 42,040,832 | 1.04 x 239 | 15 | 595 |
| 12 | Charter Communications Inc | 38,938,880 | 1.39 x 239 | 16 | 1,989 |
| 13 | Cogent Communications | 30,044,672 | 1.85 x 237 | 3 | 3,919 |
| 14 | Google LLC | 26,267,264 | 1.44 x 236 | 8 | 1,108 |
| 15 | Eli Lilly and Company | 25,630,976 | 0 | 1 | 261 |
| 16 | Windstream Communications LLC | 23,371,272 | 1.23 x 238 | 15 | 101,988 |
| 17 | Cox Communications Inc. | 23,265,536 | 1.61 x 237 | 4 | 5,185 |
| 18 | Sprint | 18,334,060 | 1.25 x 236 | 7 | 783 |
| 19 | Frontier Communications of America, Inc. | 15,617,792 | 1.02 x 234 | 6 | 2,964 |
| 20 | AT&T Corp. | 14,066,456 | 1.5 x 232 | 36 | 1,599 |