| Date | IP Address |
| 2023-10-13 | 3.136.73.221 (ClassC) |
| 2024-08-13 | 3.19.20.154 (ClassC) |
| 2024-11-24 | 18.189.240.101 (ClassC) |
| 2025-05-27 | 3.141.120.168 (ClassC) |
| 2025-08-30 | 3.136.231.13 (ClassC) |
| 2025-09-07 | 18.220.129.207 (ClassC) |
| 2025-12-26 | 3.20.219.217 (ClassC) |
| 2026-01-28 | 3.22.124.222 (ClassC) |
| Date | Domain | IP |
| prevs.seminar-assist.jp | 2024-12-26 | 3.20.68.163 |