| Date | IP Address |
| 2024-06-03 | 3.248.126.2 (ClassC) |
| 2024-09-14 | 54.195.159.200 (ClassC) |
| 2024-11-25 | 34.251.37.46 (ClassC) |
| 2025-03-17 | 52.208.246.6 (ClassC) |
| 2025-05-08 | 54.171.13.112 (ClassC) |
| 2025-08-22 | 54.73.28.6 (ClassC) |
| 2025-12-20 | 54.247.183.45 (ClassC) |
| 2026-01-08 | 54.76.114.107 (ClassC) |
| Date | Domain | IP |
| vpn3-fw01.heijmans.com | 2025-12-23 | 4.210.139.165 |
| vpn-fw01.heijmans.com | 2026-01-01 | 4.210.139.166 |
| vpn3-fw02.heijmans.com | 2026-01-01 | 4.210.139.174 |
| vpn-fw02.heijmans.com | 2026-01-01 | 4.210.139.160 |
| webmail2.heijmans.com | 2024-08-09 | 52.96.222.194 |
| vpn3.heijmans.com | 2026-01-01 | 4.210.139.175 |
| vpn.heijmans.com | 2026-01-01 | 4.210.139.173 |
| hammer.heijmans.com | 2025-05-08 | 20.50.144.212 |
| apps.heijmans.com | 2024-06-03 | 3.248.126.2 |
| www.heijmans.com | 2022-02-10 | 108.156.107.31 |