| Date | IP Address |
| 2021-09-06 | 65.8.56.112 (ClassC) |
| 2021-09-06 | 65.8.56.56 (ClassC) |
| 2021-09-09 | 52.85.89.88 (ClassC) |
| 2021-09-09 | 52.85.89.118 (ClassC) |
| 2022-04-18 | 13.32.66.12 (ClassC) |
| 2022-08-17 | 54.230.31.59 (ClassC) |
| 2022-09-29 | 18.160.181.51 (ClassC) |
| 2022-11-21 | 18.64.155.107 (ClassC) |
| 2023-11-10 | 18.161.6.123 (ClassC) |
| 2024-01-27 | 99.84.66.22 (ClassC) |
| 2024-02-18 | 99.84.66.80 (ClassC) |
| 2024-03-07 | 99.84.66.43 (ClassC) |
| 2024-03-26 | 99.84.66.123 (ClassC) |
| 2024-04-13 | 99.86.38.55 (ClassC) |
| 2024-04-23 | 18.154.206.92 (ClassC) |
| 2024-08-05 | 104.18.22.186 (ClassC) |
| 2025-07-11 | 172.64.148.137 (ClassC) |
| 2025-08-01 | 104.18.39.119 (ClassC) |
| Date | Domain | IP |
| staging.cliffsnotes.com | 2024-10-05 | 3.165.160.106 |
| www.cliffsnotes.com | 2023-12-01 | 99.84.66.80 |