| Date | IP Address |
| 2024-03-07 | 108.156.2.49 (ClassC) |
| 2026-01-23 | 3.163.24.95 (ClassC) |
| 2026-01-26 | 3.163.24.6 (ClassC) |
| Date | Domain | IP |
| login1.jpid.pf.japanpost.jp | 2024-05-25 | 52.197.240.214 |
| api.jpid.pf.japanpost.jp | 2025-12-20 | 13.114.40.61 |
| login.jpid.pf.japanpost.jp | 2025-12-27 | 3.114.113.222 |
| ins1.jpapp.pf.japanpost.jp | 2025-11-05 | 3.169.173.72 |
| static.jpapp.pf.japanpost.jp | 2026-01-23 | 3.163.24.95 |
| jpetn.sit.pf.japanpost.jp | 2026-01-19 | 8.8.8.8 |
| site.jppt.pf.japanpost.jp | 2025-11-03 | 52.199.204.78 |