| Date | IP Address |
| 2025-02-26 | 3.13.198.208 (ClassC) |
| 2025-04-14 | 3.128.10.246 (ClassC) |
| 2025-06-27 | 3.146.142.106 (ClassC) |
| 2025-08-02 | 3.143.174.160 (ClassC) |
| 2025-08-21 | 13.58.28.176 (ClassC) |
| 2025-09-07 | 18.190.122.26 (ClassC) |
| 2025-09-23 | 3.19.43.228 (ClassC) |
| 2025-10-15 | 18.118.127.14 (ClassC) |
| Date | Domain | IP |
| recruit.zenken.co.jp | 2024-02-21 | 52.194.42.71 |
| dev.recruit.zenken.co.jp | 2025-02-26 | 3.13.198.208 |
| dev.zenken.co.jp | 2025-02-26 | 3.138.81.31 |
| www.zenken.co.jp | 2023-11-01 | 54.249.116.8 |