| Date | IP Address |
| 2017-12-24 | 52.222.220.89 (ClassC) |
| 2018-01-05 | 52.222.220.140 (ClassC) |
| 2018-01-14 | 52.84.143.235 (ClassC) |
| 2018-01-15 | 13.33.252.72 (ClassC) |
| 2018-04-12 | 52.85.89.22 (ClassC) |
| 2018-10-04 | 54.192.48.206 (ClassC) |
| 2018-10-04 | 54.192.48.7 (ClassC) |
| 2018-10-04 | 54.192.48.126 (ClassC) |
| 2019-08-01 | 13.33.87.58 (ClassC) |
| 2019-08-01 | 13.225.190.30 (ClassC) |
| 2020-08-07 | 13.226.38.20 (ClassC) |
| 2020-08-07 | 13.226.38.63 (ClassC) |
| 2024-07-01 | 204.246.191.44 (ClassC) |
| 2024-08-14 | 204.246.191.90 (ClassC) |
| 2024-08-22 | 3.163.24.88 (ClassC) |
| 2024-11-04 | 204.246.191.79 (ClassC) |
| Date | Domain | IP |
| cocofump.gakken.co.jp | 2024-06-16 | 3.163.24.25 |
| ir.gakken.co.jp | 2024-07-01 | 204.246.191.44 |
| selector.gakken.co.jp | 2024-10-22 | 52.69.162.118 |
| www.gakken.co.jp | 2024-05-14 | 3.163.24.13 |