| Date | IP Address |
| 2021-11-03 | 52.84.121.99 (ClassC) |
| 2024-10-26 | 108.138.94.49 (ClassC) |
| 2024-12-01 | 18.161.6.104 (ClassC) |
| 2024-12-24 | 108.138.94.72 (ClassC) |
| 2026-02-01 | 18.161.6.123 (ClassC) |
| 2026-02-07 | 18.161.6.127 (ClassC) |
| 2026-02-12 | 18.161.6.79 (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 |