| Date | IP Address |
| 2018-03-06 | 13.33.164.181 (ClassC) |
| 2021-10-26 | 99.84.160.116 (ClassC) |
| 2022-01-01 | 13.249.137.127 (ClassC) |
| 2022-03-09 | 52.84.52.53 (ClassC) |
| 2022-04-24 | 18.160.200.36 (ClassC) |
| 2022-04-24 | 18.160.200.129 (ClassC) |
| 2024-12-03 | 18.172.170.48 (ClassC) |
| 2024-12-28 | 18.161.6.76 (ClassC) |
| 2025-01-13 | 13.224.14.36 (ClassC) |
| 2025-04-13 | 18.161.6.35 (ClassC) |
| 2025-05-11 | 18.161.6.29 (ClassC) |
| 2025-06-07 | 18.161.6.88 (ClassC) |
| 2025-09-17 | 3.163.24.20 (ClassC) |
| Date | Domain | IP |
| public.zybooks.com | 2025-07-19 | 185.199.110.153 |
| zyevents.prod.zybooks.com | 2025-07-07 | 104.18.9.243 |
| coral-sim.zybooks.com | 2025-02-26 | 18.161.6.36 |
| admin.zybooks.com | 2024-12-03 | 18.172.170.48 |
| learn.zybooks.com | 2024-06-11 | 3.163.24.16 |
| wp.zybooks.com | 2025-06-02 | 54.69.119.107 |
| resources.zybooks.com | 2024-12-23 | 18.238.238.88 |
| static-resources.zybooks.com | 2024-12-15 | 3.165.160.116 |
| zytools.zybooks.com | 2015-03-01 | 54.230.6.160 |
| programming-submissions.zybooks.com | 2024-08-04 | 3.163.158.11 |
| zyevents.zybooks.com | 2024-11-06 | 34.212.77.78 |
| exports.zybooks.com | 2024-07-05 | 3.163.24.116 |
| www.zybooks.com | 2025-03-07 | 141.193.213.10 |
| mathjax.zybooks.com | 2024-11-24 | 18.161.6.55 |
| legacy.zybooks.com | 2024-07-26 | 204.246.191.31 |