| Date | IP Address |
| 2024-11-13 | 54.65.103.233 (ClassC) |
| 2025-01-05 | 52.196.185.65 (ClassC) |
| 2025-04-08 | 52.194.4.193 (ClassC) |
| 2025-04-15 | 35.72.93.117 (ClassC) |
| 2025-08-25 | 52.197.165.38 (ClassC) |
| 2026-02-05 | 52.197.202.190 (ClassC) |
| Date | Domain | IP |
| notice.sing.co.jp | 2024-12-23 | 18.182.206.197 |
| material.sing.co.jp | 2026-01-13 | 18.180.198.201 |
| material-chu.sing.co.jp | 2024-11-13 | 54.65.103.233 |
| www.sing.co.jp | 2025-03-06 | 52.197.155.66 |