| Date | IP Address |
| 2022-05-19 | 23.53.34.8 (ClassC) |
| 2024-01-09 | 23.46.17.8 (ClassC) |
| 2024-11-25 | 23.46.17.43 (ClassC) |
| 2025-04-09 | 104.70.127.41 (ClassC) |
| 2025-04-23 | 23.46.228.170 (ClassC) |
| 2025-07-03 | 23.216.147.208 (ClassC) |
| 2026-01-24 | 93.122.86.52 (ClassC) |
| Date | Domain | IP |
| iam-staging.viessmann.sg | 2025-11-20 | 20.43.146.103 |
| api-integration.viessmann.sg | 2024-11-09 | 20.212.206.118 |
| t.viessmann.sg | 2025-05-09 | 34.111.102.177 |
| www.viessmann.sg | 2024-11-25 | 23.46.17.43 |