| Date | IP Address |
| 2021-02-06 | 18.180.183.55 (ClassC) |
| 2024-01-04 | 52.69.98.189 (ClassC) |
| 2025-09-20 | 3.33.203.148 (ClassC) |
| 2026-03-05 | 52.223.53.46 (ClassC) |
| Date | Domain | IP |
| seikyuweb.twellv.co.jp | 2025-09-24 | 133.186.35.104 |
| www.twellv.co.jp | 2025-09-20 | 3.33.203.148 |