| Date | IP Address |
| 2019-01-25 | 54.230.90.65 (ClassC) |
| 2019-02-09 | 99.84.41.69 (ClassC) |
| 2025-04-25 | 3.163.24.117 (ClassC) |
| 2025-06-16 | 3.163.165.107 (ClassC) |
| Date | Domain | IP |
| api.secumail.nl | 2024-02-21 | 3.163.24.83 |
| public-api.secumail.nl | 2024-02-05 | 204.246.191.31 |
| test-public-api.secumail.nl | 2024-12-18 | 3.163.189.90 |
| developer.secumail.nl | 2021-02-25 | 54.230.126.64 |
| attachment.secumail.nl | 2024-12-23 | 99.84.66.63 |
| portal-test.secumail.nl | 2024-11-17 | 99.84.66.18 |
| www.secumail.nl | 2025-04-25 | 3.163.24.117 |