| Date | IP Address |
| 2019-03-01 | 99.84.254.105 (ClassC) |
| 2019-03-01 | 99.84.254.54 (ClassC) |
| 2021-01-02 | 13.226.18.30 (ClassC) |
| 2021-01-02 | 13.226.18.62 (ClassC) |
| 2021-01-02 | 13.226.18.7 (ClassC) |
| 2022-02-24 | 52.85.91.18 (ClassC) |
| 2024-03-09 | 18.161.6.111 (ClassC) |
| 2025-06-25 | 18.161.6.51 (ClassC) |
| Date | Domain | IP |
| s3.pad.study.jp | 2024-04-30 | 52.219.136.230 |
| api.pad.study.jp | 2024-03-09 | 18.161.6.111 |
| contents.pad.study.jp | 2025-04-16 | 99.84.66.95 |