| Date | IP Address |
| 2025-01-30 | 13.248.218.40 (ClassC) |
| 2025-04-03 | 76.223.75.200 (ClassC) |
| Date | Domain | IP |
| static.preferred.jp | 2024-11-25 | 3.163.24.35 |
| tech.preferred.jp | 2024-06-13 | 18.161.6.26 |
| chainercv-models.preferred.jp | 2021-07-30 | 99.84.64.86 |
| www.preferred.jp | 2023-11-01 | 3.163.24.79 |