| Date | IP Address |
| 2020-01-20 | 35.158.75.49 (ClassC) |
| 2025-05-24 | 52.59.93.56 (ClassC) |
| 2025-09-02 | 52.57.162.72 (ClassC) |
| 2025-09-29 | 52.28.41.89 (ClassC) |
| Date | Domain | IP |
| backoffice.cennik.vaillant.pl | 2025-01-26 | 18.65.229.20 |
| api.cennik.vaillant.pl | 2025-05-24 | 52.59.93.56 |