| Date | IP Address |
| 2023-08-28 | 131.130.249.233 (ClassC) |
| 2025-01-15 | 131.130.249.234 (ClassC) |
| Date | Domain | IP |
| ns1.cert.at | 2024-04-01 | 83.136.38.158 |
| ns5.cert.at | 2024-12-24 | 194.58.198.32 |
| sinkhole.cert.at | 2024-03-27 | 83.136.32.34 |
| nis.cert.at | 2024-11-13 | 83.136.38.239 |
| pdns.cert.at | 2024-12-03 | 78.104.145.83 |
| contacts.cert.at | 2024-10-13 | 83.136.38.162 |
| lists.cert.at | 2023-08-28 | 83.136.38.154 |
| www.cert.at | 2023-08-28 | 131.130.249.233 |