| Date | IP Address |
| 2023-08-09 | 13.56.128.144 (ClassC) |
| 2024-07-24 | 104.18.18.37 (ClassC) |
| 2025-01-09 | 104.18.34.21 (ClassC) |
| 2025-06-04 | 172.64.153.235 (ClassC) |
| Date | Domain | IP |
| api.mentor.duden.de | 2023-08-16 | 3.65.168.236 |
| lp.mentor.duden.de | 2023-08-09 | 13.56.128.144 |
| angebot.mentor.duden.de | 2024-06-12 | 172.64.153.235 |