| Date | IP Address |
| 2018-07-27 | 104.104.247.249 (ClassC) |
| 2023-08-25 | 23.49.0.122 (ClassC) |
| 2023-11-02 | 23.37.97.206 (ClassC) |
| 2024-12-14 | 23.48.16.21 (ClassC) |
| 2025-01-30 | 23.33.95.16 (ClassC) |
| 2025-02-22 | 23.53.52.21 (ClassC) |
| 2025-03-15 | 23.39.16.17 (ClassC) |
| 2025-03-29 | 88.221.152.2 (ClassC) |
| 2025-04-05 | 23.192.117.19 (ClassC) |
| 2025-05-31 | 23.218.98.18 (ClassC) |
| Date | Domain | IP |
| bizid.chugin.co.jp | 2023-12-01 | 104.96.163.214 |
| dev-bizid.chugin.co.jp | 2025-04-10 | 23.41.4.88 |
| service.chugin.co.jp | 2024-11-24 | 23.41.4.84 |
| test-service.chugin.co.jp | 2025-03-26 | 23.41.4.88 |
| auth.chugin.co.jp | 2024-01-08 | 104.96.163.214 |
| test-auth.chugin.co.jp | 2025-04-04 | 23.41.4.72 |
| dev-auth.chugin.co.jp | 2025-04-04 | 23.41.4.88 |
| direct.chugin.co.jp | 2024-01-16 | 104.16.205.233 |
| www.chugin.co.jp | 2023-08-25 | 23.49.0.122 |