| Date | IP Address |
| 2015-11-28 | 85.13.141.9 (ClassC) |
| 2019-02-26 | 212.224.116.68 (ClassC) |
| 2023-06-05 | 31.172.86.52 (ClassC) |
| 2025-02-11 | 31.172.91.133 (ClassC) |
| Date | Domain | IP |
| mail10.ff-b.de | 2024-12-15 | 31.172.91.133 |
| mail1.ff-b.de | 2024-10-27 | 31.172.91.133 |
| mail7.ff-b.de | 2024-11-09 | 31.172.91.133 |
| mail.comune.ff-b.de | 2024-10-04 | 31.172.91.133 |