| Date | IP Address |
| 2018-02-06 | 104.91.192.158 (ClassC) |
| 2019-11-13 | 23.56.169.34 (ClassC) |
| 2022-03-23 | 184.31.0.194 (ClassC) |
| 2022-03-23 | 184.31.0.201 (ClassC) |
| 2024-11-05 | 23.46.228.170 (ClassC) |
| 2024-11-10 | 23.55.167.33 (ClassC) |
| 2024-12-06 | 104.70.127.41 (ClassC) |
| 2025-04-14 | 23.46.228.167 (ClassC) |
| 2025-10-07 | 23.46.17.43 (ClassC) |
| 2025-10-24 | 23.46.17.140 (ClassC) |
| 2025-11-03 | 23.216.147.208 (ClassC) |
| 2026-01-19 | 23.216.147.209 (ClassC) |
| Date | Domain | IP |
| t.viessmann.cz | 2024-11-05 | 34.111.102.177 |
| www.viessmann.cz | 2024-11-05 | 23.46.228.170 |