| Date | IP Address |
| 2023-12-26 | 23.64.114.66 (ClassC) |
| 2024-04-25 | 23.215.11.233 (ClassC) |
| 2024-04-25 | 23.215.11.237 (ClassC) |
| 2024-07-03 | 184.30.42.194 (ClassC) |
| 2024-11-25 | 23.41.4.87 (ClassC) |
| 2025-11-13 | 23.41.4.91 (ClassC) |
| Date | Domain | IP |
| quotamanager.developer.postnl.nl | 2024-02-22 | 23.192.230.92 |
| apimanager.developer.postnl.nl | 2024-11-25 | 23.41.4.87 |