| Date | IP Address |
| 2021-05-21 | 85.235.64.59 (ClassC) |
| 2025-01-30 | 89.31.143.150 (ClassC) |
| Date | Domain | IP |
| ms1.mauthausen.biz | 2025-01-30 | 89.31.143.150 |
| mail3.mauthausen.biz | 2025-01-30 | 89.31.143.150 |
| mta.mauthausen.biz | 2025-01-30 | 89.31.143.150 |
| www.kuk.mauthausen.biz | 2025-01-30 | 89.31.143.150 |
| outmail.mauthausen.biz | 2025-01-30 | 89.31.143.150 |
| vmail.mauthausen.biz | 2025-01-30 | 89.31.143.150 |
| spam.mauthausen.biz | 2025-01-30 | 89.31.143.150 |
| authsmtp.mauthausen.biz | 2025-01-30 | 89.31.143.150 |
| www.mauthausen.biz | 2025-01-30 | 89.31.143.150 |