| Date | IP Address |
| 2019-10-17 | 80.237.133.194 (ClassC) |
| 2025-12-10 | 5.35.226.194 (ClassC) |
| Date | Domain | IP |
| mail11.ff-muehlhausen.de | 2025-09-15 | 5.35.226.194 |
| imap1.ff-muehlhausen.de | 2025-06-21 | 5.35.226.194 |
| mail02.ff-muehlhausen.de | 2025-08-22 | 5.35.226.194 |
| static.ff-muehlhausen.de | 2025-08-22 | 5.35.226.194 |
| comune.ff-muehlhausen.de | 2025-05-31 | 5.35.226.194 |
| smtp.comune.ff-muehlhausen.de | 2025-09-15 | 5.35.226.194 |
| auth.ff-muehlhausen.de | 2025-05-31 | 5.35.226.194 |
| newmail.ff-muehlhausen.de | 2025-09-20 | 5.35.226.194 |
| imap.ff-muehlhausen.de | 2025-08-25 | 5.35.226.194 |
| authsmtp.ff-muehlhausen.de | 2025-06-02 | 5.35.226.194 |
| ms.ff-muehlhausen.de | 2025-08-26 | 5.35.226.194 |