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. | 101,821,441 | 1.07 x 241 | 10 | 2,156 | |
| DoD Network Information Center | 97,899,520 | 233 | 215 | 7,811 | |
| Comcast Cable Communications, LLC | 75,512,102 | 1.03 x 245 | 14 | 1,385 | |
| 4 | Level 3 Communications, Inc. | 65,780,090 | 1.34 x 237 | 15 | 4,120 |
| 5 | MCI Communications Services, Inc. d/b/a Verizon Business | 64,388,608 | 1.3 x 240 | 37 | 18,933 |
| 6 | Amazon.com, Inc. | 50,677,760 | 1.13 x 236 | 4 | 6,021 |
| 7 | Apple Inc. | 48,780,288 | 1.02 x 234 | 3 | 1,244 |
| 8 | Cellco Partnership DBA Verizon Wireless | 43,591,680 | 1.32 x 237 | 4 | 2,165 |
| 9 | CenturyLink Communications, LLC | 42,460,080 | 1.08 x 240 | 43 | 4,778 |
| 10 | Microsoft Corporation | 39,592,448 | 1.04 x 239 | 14 | 517 |
| 11 | Charter Communications Inc | 38,809,856 | 1.68 x 238 | 16 | 2,078 |
| 12 | CHECS | 33,572,608 | 232 | 1 | 23 |
| 13 | Cogent Communications | 29,058,304 | 1.01 x 238 | 3 | 3,853 |
| 14 | Eli Lilly and Company | 25,257,216 | 0 | 1 | 232 |
| 15 | Cox Communications Inc. | 22,730,496 | 1.02 x 238 | 1 | 4,840 |
| 16 | AT&T Global Network Services, LLC | 19,352,576 | 1.01 x 234 | 4 | 521 |
| 17 | Google LLC | 17,634,944 | 1.44 x 236 | 7 | 916 |
| 18 | Sprint | 17,281,036 | 1.88 x 235 | 6 | 292 |
| 19 | Frontier Communications of America, Inc. | 15,198,976 | 1.03 x 234 | 6 | 2,942 |
| 20 | AT&T Corp. | 14,372,096 | 1.59 x 236 | 35 | 1,757 |