| Date | IP Address |
| 2025-04-21 | 45.60.73.172 (ClassC) |
| Date | Domain | IP |
| www.e4.billingjapan.co.jp | 2025-04-21 | 211.132.171.131 |
| service5.billingjapan.co.jp | 2025-04-06 | 45.60.73.172 |
| f.personal.billingjapan.co.jp | 2025-04-21 | 45.60.73.172 |
| www.billingjapan.co.jp | 2025-04-17 | 219.94.174.135 |