| Date | IP Address |
| 2021-02-13 | 85.13.130.64 (ClassC) |
| 2025-11-19 | 85.13.146.196 (ClassC) |
| Date | Domain | IP |
| mail01.mailfach.net | 2025-10-15 | 85.13.146.196 |
| mail11.mailfach.net | 2025-10-15 | 85.13.146.196 |
| mail12.mailfach.net | 2025-10-15 | 85.13.146.196 |
| barracuda.mailfach.net | 2025-10-12 | 85.13.146.196 |
| m.mailfach.net | 2025-10-15 | 85.13.146.196 |
| antispam.mailfach.net | 2025-10-13 | 85.13.146.196 |
| correo.mailfach.net | 2025-10-16 | 85.13.146.196 |
| ftp.mailfach.net | 2025-10-06 | 85.13.146.196 |
| authsmtp.mailfach.net | 2025-11-19 | 85.13.146.196 |
| host.mailfach.net | 2025-10-14 | 85.13.146.196 |