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) | 239,176,192 | 1.01 x 232 | 41 | 4,534 | |
| Amazon.com, Inc. | 234,248,960 | 1.93 x 241 | 5 | 23,275 | |
| AT&T Enterprises, LLC | 129,168,645 | 1.06 x 241 | 31 | 3,751 | |
| 4 | Verizon Business | 110,565,888 | 1.03 x 241 | 64 | 6,657 |
| 5 | Comcast Cable Communications, LLC | 95,407,104 | 1.2 x 248 | 38 | 8,009 |
| 6 | DoD Network Information Center | 94,065,408 | 1.1 x 233 | 155 | 8,032 |
| 7 | Microsoft Corporation | 83,757,824 | 1.12 x 239 | 14 | 2,202 |
| 8 | Google LLC | 57,359,472 | 1.23 x 237 | 14 | 5,881 |
| 9 | Apple Inc. | 44,736,768 | 1.02 x 234 | 2 | 2,062 |
| 10 | Level 3 Communications, Inc. | 41,064,488 | 1.13 x 237 | 9 | 4,350 |
| 11 | Charter Communications Inc | 39,499,072 | 1.37 x 239 | 15 | 2,707 |
| 12 | Cogent Communications | 37,670,656 | 1.82 x 237 | 2 | 4,693 |
| 13 | CenturyLink Communications, LLC | 36,687,232 | 1.02 x 240 | 29 | 3,159 |
| 14 | Cox Communications Inc. | 24,992,261 | 1.53 x 238 | 1 | 10,756 |
| 15 | Charter Communications | 15,035,648 | 1.01 x 239 | 14 | 5,093 |
| 16 | T-Mobile USA, Inc. | 14,564,352 | 1.13 x 236 | 5 | 633 |
| 17 | Frontier Communications of America, Inc. | 13,676,034 | 1.06 x 236 | 5 | 1,430 |
| 18 | University of California, San Diego | 12,859,914 | 1.25 x 232 | 1 | 24 |
| 19 | Windstream Communications LLC | 12,400,128 | 1.25 x 241 | 1 | 3,076 |
| 20 | Cablevision Systems Corp. | 10,887,424 | 1.19 x 237 | 2 | 2,796 |