| Date | IP Address |
| 2017-04-03 | 54.77.191.177 (ClassC) |
| 2019-03-20 | 172.226.77.128 (ClassC) |
| 2024-08-09 | 104.18.34.246 (ClassC) |
| 2025-01-09 | 104.18.10.106 (ClassC) |
| 2025-03-22 | 104.18.11.106 (ClassC) |
| Date | Domain | IP |
| home.efax.de | 2015-02-06 | 165.254.155.80 |
| sassets.efax.de | 2015-03-10 | 23.60.128.158 |
| www.efax.de | 2024-08-09 | 104.18.34.246 |