| Date | IP Address |
| 2024-10-24 | 18.179.114.238 (ClassC) |
| 2024-11-09 | 18.176.238.63 (ClassC) |
| 2024-12-30 | 18.182.94.134 (ClassC) |
| 2025-01-24 | 52.196.139.19 (ClassC) |
| 2025-01-27 | 54.92.84.20 (ClassC) |
| 2025-02-12 | 13.115.208.143 (ClassC) |
| 2025-02-19 | 52.193.129.89 (ClassC) |
| 2025-02-22 | 54.65.171.195 (ClassC) |
| 2025-03-04 | 52.194.86.118 (ClassC) |
| 2025-05-02 | 52.196.134.52 (ClassC) |
| 2025-05-05 | 18.182.234.111 (ClassC) |
| 2025-05-28 | 13.113.59.54 (ClassC) |
| Date | Domain | IP |
| wordweb.kumon.co.jp | 2025-03-04 | 35.79.33.231 |
| knowledge.kumon.co.jp | 2024-10-24 | 18.179.114.238 |
| dev.frger.kumon.co.jp | 2025-03-06 | 13.113.161.56 |
| digital.dev.kumon.co.jp | 2024-12-31 | 99.84.66.29 |
| instructor.digital.dev.kumon.co.jp | 2024-02-26 | 99.84.66.111 |
| content.digital.dev.kumon.co.jp | 2024-02-17 | 13.224.14.18 |
| dev.webentry.kumon.co.jp | 2025-04-07 | 204.246.191.84 |