| Date | IP Address |
| 2021-07-30 | 54.230.226.28 (ClassC) |
| 2021-07-30 | 54.230.226.4 (ClassC) |
| 2021-07-30 | 54.230.226.40 (ClassC) |
| 2024-09-30 | 18.161.6.82 (ClassC) |
| 2025-03-28 | 18.65.229.35 (ClassC) |
| 2025-10-27 | 18.161.6.8 (ClassC) |
| 2026-01-27 | 18.161.6.75 (ClassC) |
| 2026-02-01 | 18.161.6.72 (ClassC) |
| Date | Domain | IP |
| qa.work-site.kensetsu-site.com | 2024-12-22 | 204.246.191.27 |
| cdn.work-site.kensetsu-site.com | 2024-09-30 | 18.161.6.82 |
| auth-api.s1.data-in-site.kensetsu-site.com | 2024-09-22 | 54.199.77.0 |
| s2.skillmap-site.kensetsu-site.com | 2025-01-13 | 18.65.229.105 |
| www.worksite.kensetsu-site.com | 2023-11-02 | 3.163.24.14 |
| manual.kensetsu-site.com | 2026-02-01 | 13.158.203.77 |
| prom.kensetsu-site.com | 2025-08-17 | 3.163.24.122 |
| gs.kensetsu-site.com | 2025-08-02 | 18.177.228.111 |
| s2.external.api.gs.kensetsu-site.com | 2024-08-01 | 54.150.170.141 |
| www.kensetsu-site.com | 2024-06-14 | 3.163.24.41 |