| Date | IP Address |
| 2021-03-26 | 54.228.28.65 (ClassC) |
| 2025-01-18 | 52.215.149.120 (ClassC) |
| 2025-02-10 | 54.154.107.247 (ClassC) |
| 2025-04-18 | 52.30.231.87 (ClassC) |
| 2025-06-03 | 52.215.87.176 (ClassC) |
| 2025-07-20 | 54.229.163.231 (ClassC) |
| 2025-07-28 | 52.16.198.14 (ClassC) |
| 2025-08-13 | 34.251.250.212 (ClassC) |
| 2025-09-13 | 108.128.85.120 (ClassC) |
| Date | Domain | IP |
| mock.tst.essent.nl | 2024-02-07 | 3.163.24.115 |
| autodiscover.mail.tst.essent.nl | 2025-01-18 | 52.215.149.120 |