| Date | IP Address |
| 2021-03-01 | 80.67.17.84 (ClassC) |
| 2025-07-28 | 92.205.53.133 (ClassC) |
| 2026-01-17 | 92.205.173.201 (ClassC) |
| Date | Domain | IP |
| mx3.kratzert.net | 2025-07-29 | 92.205.53.133 |
| mta.kratzert.net | 2025-07-29 | 92.205.53.133 |
| posta.kratzert.net | 2025-07-28 | 92.205.53.133 |
| gate.kratzert.net | 2025-08-01 | 92.205.53.133 |
| authsmtp.kratzert.net | 2025-07-02 | 92.205.53.133 |
| mailserver.kratzert.net | 2025-07-28 | 92.205.53.133 |
| mxs.kratzert.net | 2025-07-29 | 92.205.53.133 |
| post.kratzert.net | 2025-07-29 | 92.205.53.133 |
| mailbox.kratzert.net | 2025-08-11 | 92.205.53.133 |