| Date | IP Address |
| 2024-11-21 | 3.163.24.66 (ClassC) |
| 2024-12-09 | 3.163.24.33 (ClassC) |
| 2024-12-22 | 18.65.229.21 (ClassC) |
| 2024-12-30 | 3.163.24.87 (ClassC) |
| 2025-01-12 | 3.163.24.73 (ClassC) |
| Date | Domain | IP |
| d8-preprod.roberthalf.jp | 2024-12-27 | 104.18.15.90 |
| collect.roberthalf.jp | 2024-11-21 | 52.223.16.43 |
| www.roberthalf.jp | 2024-10-18 | 3.163.24.33 |