| Date | IP Address |
| 2017-05-12 | 40.136.60.97 (ClassC) |
| 2019-06-28 | 165.254.94.51 (ClassC) |
| 2019-08-13 | 165.254.94.59 (ClassC) |
| 2019-08-27 | 23.50.52.170 (ClassC) |
| 2020-03-23 | 23.55.220.43 (ClassC) |
| 2020-04-13 | 23.222.28.113 (ClassC) |
| 2023-08-25 | 23.222.145.247 (ClassC) |
| 2023-11-14 | 23.34.71.205 (ClassC) |
| 2024-10-01 | 23.198.109.141 (ClassC) |
| 2025-01-09 | 23.6.108.227 (ClassC) |
| Date | Domain | IP |
| api.puzzle.rc.r-staffing.co.jp | 2024-07-07 | 13.112.235.70 |
| cdn.r-staffing.co.jp | 2024-07-04 | 3.163.24.77 |
| image.cr.r-staffing.co.jp | 2023-08-25 | 23.222.145.247 |
| click.cr.r-staffing.co.jp | 2024-12-21 | 13.111.151.152 |
| www.r-staffing.co.jp | 2024-12-10 | 106.187.107.193 |