| Date | IP Address |
| 2020-03-23 | 99.84.247.48 (ClassC) |
| 2020-04-09 | 143.204.142.30 (ClassC) |
| 2020-04-09 | 143.204.142.58 (ClassC) |
| 2020-08-23 | 143.204.150.16 (ClassC) |
| 2021-12-20 | 143.204.68.28 (ClassC) |
| 2022-01-04 | 52.84.90.107 (ClassC) |
| 2022-01-05 | 65.9.83.16 (ClassC) |
| 2022-01-13 | 143.204.181.3 (ClassC) |
| 2022-01-31 | 65.9.78.25 (ClassC) |
| 2022-01-31 | 65.9.78.118 (ClassC) |
| 2022-02-08 | 13.32.240.93 (ClassC) |
| 2022-02-08 | 13.32.240.44 (ClassC) |
| 2022-03-08 | 13.226.17.87 (ClassC) |
| 2022-03-23 | 52.222.137.3 (ClassC) |
| 2022-09-14 | 54.192.51.116 (ClassC) |
| 2022-10-17 | 18.160.78.65 (ClassC) |
| 2024-07-26 | 204.246.191.31 (ClassC) |
| 2024-08-15 | 204.246.191.118 (ClassC) |
| 2024-10-01 | 3.163.158.60 (ClassC) |
| 2024-12-21 | 108.138.94.39 (ClassC) |
| 2025-01-28 | 108.138.94.128 (ClassC) |
| 2025-05-31 | 3.175.34.96 (ClassC) |
| 2025-07-10 | 3.175.34.78 (ClassC) |
| 2025-07-27 | 204.246.191.111 (ClassC) |
| 2025-08-05 | 204.246.191.76 (ClassC) |
| 2025-12-15 | 3.169.173.104 (ClassC) |
| Date | Domain | IP |
| public.zybooks.com | 2025-08-22 | 185.199.109.153 |
| 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 | 2024-06-30 | 18.161.6.79 |
| wp.zybooks.com | 2025-06-02 | 54.69.119.107 |
| zyserver.zybooks.com | 2025-12-13 | 104.18.9.243 |
| 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 | 2024-12-04 | 3.163.165.70 |
| legacy.zybooks.com | 2024-07-26 | 204.246.191.31 |