| Date | IP Address |
| 2020-08-02 | 99.86.109.57 (ClassC) |
| 2023-11-29 | 204.246.191.62 (ClassC) |
| 2024-07-09 | 204.246.191.58 (ClassC) |
| 2025-09-13 | 204.246.191.22 (ClassC) |
| 2025-09-16 | 204.246.191.73 (ClassC) |
| 2025-12-22 | 3.163.24.26 (ClassC) |
| 2026-01-16 | 3.163.24.68 (ClassC) |
| 2026-02-13 | 3.163.24.99 (ClassC) |
| Date | Domain | IP |
| www3.kobunsha.com | 2024-10-05 | 18.161.6.125 |
| special.kobunsha.com | 2023-11-29 | 204.246.191.62 |
| data.en.kobunsha.com | 2024-10-26 | 108.138.94.49 |
| recruit.kobunsha.com | 2024-11-11 | 99.84.66.125 |
| www.kobunsha.com | 2023-11-01 | 3.163.24.89 |