| Date | IP Address |
| 2019-12-22 | 184.26.95.211 (ClassC) |
| 2020-12-08 | 172.232.14.201 (ClassC) |
| 2021-10-08 | 104.125.2.138 (ClassC) |
| 2022-06-20 | 23.38.191.43 (ClassC) |
| 2025-07-15 | 23.41.4.85 (ClassC) |
| 2025-08-07 | 23.41.4.70 (ClassC) |
| Date | Domain | IP |
| api.retail.fat.postnl.nl | 2024-08-11 | 104.96.163.133 |
| nabestaanden.fat.postnl.nl | 2025-07-23 | 23.41.4.70 |
| webapp.fat.postnl.nl | 2025-07-15 | 23.41.4.85 |
| vhs.fat.postnl.nl | 2024-09-14 | 23.41.4.86 |
| checklist.fat.postnl.nl | 2025-08-03 | 23.41.4.70 |