| Date | IP Address |
| 2019-12-01 | 78.46.5.8 (ClassC) |
| 2024-09-28 | 136.243.147.81 (ClassC) |
| 2024-11-20 | 199.59.243.227 (ClassC) |
| 2026-02-17 | 178.63.81.225 (ClassC) |
| Date | Domain | IP |
| mail.nationalbibliothek.de | 2024-12-29 | 199.59.243.227 |
| www.nationalbibliothek.de | 2025-05-14 | 178.63.81.225 |