| Date | IP Address |
| 2019-10-23 | 192.185.21.145 (ClassC) |
| 2024-08-27 | 52.96.110.88 (ClassC) |
| 2024-09-15 | 40.97.205.8 (ClassC) |
| 2024-10-01 | 52.96.166.40 (ClassC) |
| 2025-01-20 | 52.96.3.184 (ClassC) |
| Date | Domain | IP |
| cpanel.katzamsterdam.org | 2024-09-18 | 192.185.21.145 |
| autodiscover.katzamsterdam.org | 2024-08-27 | 52.96.110.88 |