| Date | IP Address |
| 2020-08-26 | 23.197.195.216 (ClassC) |
| 2024-11-08 | 23.203.134.235 (ClassC) |
| 2025-05-18 | 23.41.4.72 (ClassC) |
| 2026-02-08 | 23.41.4.88 (ClassC) |
| Date | Domain | IP |
| service.dhbk.co.jp | 2025-03-23 | 23.202.47.33 |
| auth.dhbk.co.jp | 2024-03-10 | 104.96.163.209 |
| test-auth.dhbk.co.jp | 2024-11-08 | 23.203.134.235 |
| dev-auth.dhbk.co.jp | 2024-08-20 | 23.192.230.86 |
| kfscl.dhbk.co.jp | 2026-02-08 | 20.44.142.139 |
| www.dhbk.co.jp | 2023-11-01 | 52.196.9.92 |