| Date | IP Address |
| 2024-06-11 | 89.191.86.20 (ClassC) |
| 2024-06-24 | 195.30.123.137 (ClassC) |
| 2025-01-01 | 89.191.69.71 (ClassC) |
| 2025-01-08 | 195.30.141.177 (ClassC) |
| Date | Domain | IP |
| service.cms.check24.de | 2024-10-21 | 195.30.141.73 |
| l.cms.check24.de | 2024-06-11 | 89.191.86.20 |
| admin.cms.check24.de | 2023-10-31 | 185.143.68.17 |
| files.cms.check24.de | 2024-08-09 | 89.191.86.20 |