| Date | IP Address |
| 2019-12-11 | 176.52.247.145 (ClassC) |
| 2026-02-08 | 185.137.168.142 (ClassC) |
| Date | Domain | IP |
| smtp2.zahnaerzte-engel.de | 2025-09-25 | 185.137.168.142 |
| mail9.zahnaerzte-engel.de | 2025-08-10 | 185.137.168.142 |
| smtps.zahnaerzte-engel.de | 2025-08-19 | 185.137.168.142 |
| www.zahnaerzte-engel.de | 2025-09-11 | 185.137.168.142 |
| mailx.zahnaerzte-engel.de | 2025-12-21 | 185.137.168.142 |
| proxy.zahnaerzte-engel.de | 2025-08-29 | 185.137.168.142 |