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. | 116,499,457 | 1.08 x 241 | 10 | 2,094 | |
| DoD Network Information Center | 99,143,168 | 233 | 220 | 7,897 | |
| Comcast Cable Communications, LLC | 75,512,614 | 1.03 x 245 | 14 | 1,448 | |
| 4 | Level 3 Communications, Inc. | 65,800,194 | 1.09 x 237 | 15 | 4,067 |
| 5 | MCI Communications Services, Inc. d/b/a Verizon Business | 57,760,000 | 1.27 x 240 | 36 | 21,165 |
| 6 | Amazon.com, Inc. | 54,020,352 | 1.29 x 236 | 4 | 6,794 |
| 7 | Apple Inc. | 48,999,424 | 1.02 x 234 | 3 | 1,304 |
| 8 | Cellco Partnership DBA Verizon Wireless | 43,515,136 | 1.32 x 237 | 4 | 2,218 |
| 9 | CenturyLink Communications, LLC | 42,936,240 | 1.05 x 240 | 43 | 4,821 |
| 10 | Microsoft Corporation | 39,597,568 | 1.04 x 239 | 14 | 532 |
| 11 | Charter Communications Inc | 38,826,496 | 1.39 x 239 | 16 | 2,104 |
| 12 | CHECS | 33,572,608 | 232 | 1 | 23 |
| 13 | Cogent Communications | 29,747,200 | 1.92 x 237 | 3 | 3,866 |
| 14 | Eli Lilly and Company | 25,628,160 | 0 | 1 | 250 |
| 15 | Cox Communications Inc. | 23,005,696 | 1.11 x 237 | 3 | 5,051 |
| 16 | Google LLC | 17,682,304 | 1.44 x 236 | 7 | 968 |
| 17 | Sprint | 17,657,452 | 1.88 x 235 | 7 | 580 |
| 18 | Frontier Communications of America, Inc. | 15,335,424 | 1.02 x 234 | 6 | 2,976 |
| 19 | AT&T Corp. | 14,219,776 | 1.4 x 232 | 35 | 1,700 |
| 20 | Windstream Communications LLC | 13,823,488 | 1.27 x 238 | 16 | 1,135 |