| Date | IP Address |
| 2024-01-16 | 104.16.205.233 (ClassC) |
| 2024-02-21 | 104.16.204.233 (ClassC) |
| 2024-04-15 | 104.19.154.98 (ClassC) |
| 2024-10-19 | 104.17.9.193 (ClassC) |
| 2024-12-24 | 104.17.10.193 (ClassC) |
| 2025-06-28 | 104.18.68.230 (ClassC) |
| 2026-01-27 | 104.18.69.230 (ClassC) |
| Date | Domain | IP |
| bizid.chugin.co.jp | 2023-12-01 | 104.96.163.214 |
| dev-bizid.chugin.co.jp | 2025-10-13 | 23.41.4.72 |
| service.chugin.co.jp | 2025-04-05 | 23.202.47.11 |
| test-service.chugin.co.jp | 2025-12-10 | 23.41.4.72 |
| auth.chugin.co.jp | 2024-01-08 | 104.96.163.214 |
| test-auth.chugin.co.jp | 2025-10-13 | 23.41.4.72 |
| dev-auth.chugin.co.jp | 2025-07-24 | 104.100.168.162 |
| direct.chugin.co.jp | 2024-01-16 | 104.16.205.233 |
| www.chugin.co.jp | 2023-08-25 | 23.49.0.122 |