| Date | IP Address |
| 2025-01-09 | 89.191.86.48 (ClassC) |
| Date | Domain | IP |
| api.krankenkassen.check24.de | 2025-01-03 | 89.191.86.48 |
| extapi.krankenkassen.check24.de | 2025-01-09 | 89.191.86.48 |
| m.krankenkassen.check24.de | 2025-01-01 | 89.191.86.48 |
| bo.krankenkassen.check24.de | 2025-01-09 | 89.191.86.48 |
| app.krankenkassen.check24.de | 2025-01-03 | 89.191.86.48 |
| rabbitmq.krankenkassen.check24.de | 2025-01-09 | 89.191.86.48 |
| fax-test.krankenkassen.check24.de | 2025-01-01 | 89.191.86.48 |