| Date | IP Address |
| 2017-04-11 | 24.143.193.250 (ClassC) |
| 2017-05-14 | 204.93.46.4 (ClassC) |
| 2020-06-07 | 13.226.138.10 (ClassC) |
| 2020-06-07 | 13.226.138.125 (ClassC) |
| 2020-07-19 | 13.249.85.8 (ClassC) |
| 2020-07-19 | 13.249.85.31 (ClassC) |
| 2020-07-19 | 13.249.85.74 (ClassC) |
| 2020-08-24 | 13.225.207.104 (ClassC) |
| 2020-08-24 | 13.225.207.14 (ClassC) |
| 2020-08-24 | 13.225.207.89 (ClassC) |
| 2021-08-30 | 13.225.206.120 (ClassC) |
| 2021-12-24 | 65.8.158.75 (ClassC) |
| 2022-01-16 | 13.225.214.3 (ClassC) |
| 2024-12-29 | 99.86.38.114 (ClassC) |
| 2025-07-08 | 204.246.191.123 (ClassC) |
| 2025-07-16 | 204.246.191.32 (ClassC) |
| 2025-08-22 | 18.161.6.48 (ClassC) |
| 2025-09-11 | 204.246.191.9 (ClassC) |
| 2025-12-13 | 18.161.6.56 (ClassC) |
| 2026-02-13 | 3.163.24.110 (ClassC) |
| Date | Domain | IP |
| authsmtp.stepexpert.nl | 2024-07-11 | 18.161.6.15 |
| www.stepexpert.nl | 2023-12-14 | 204.246.191.66 |