| Date | IP Address |
| 2024-11-09 | 89.191.86.207 (ClassC) |
| Date | Domain | IP |
| pbe.urlaub.check24.de | 2024-10-26 | 89.191.86.207 |
| travelapi.urlaub.check24.de | 2024-11-09 | 89.191.91.140 |
| m.urlaub.check24.de | 2023-08-29 | 89.191.67.180 |
| www.m.urlaub.check24.de | 2023-08-29 | 89.191.67.180 |
| api-flug-unterkunft.urlaub.check24.de | 2024-09-30 | 89.191.67.180 |
| assistant.urlaub.check24.de | 2024-11-09 | 89.191.86.207 |
| www.urlaub.check24.de | 2024-09-28 | 89.191.67.180 |