| Date | IP Address |
| 2021-07-30 | 13.225.206.78 (ClassC) |
| 2021-08-02 | 52.85.61.11 (ClassC) |
| 2021-08-02 | 52.85.61.76 (ClassC) |
| 2024-03-15 | 3.163.24.58 (ClassC) |
| 2024-07-24 | 99.86.38.112 (ClassC) |
| 2024-09-15 | 3.163.24.55 (ClassC) |
| 2025-03-20 | 18.161.6.55 (ClassC) |
| 2025-05-10 | 18.161.6.46 (ClassC) |
| 2025-06-20 | 3.163.24.122 (ClassC) |
| 2025-09-20 | 3.169.173.53 (ClassC) |
| 2025-12-16 | 3.169.173.82 (ClassC) |
| 2026-02-27 | 3.163.24.35 (ClassC) |
| Date | Domain | IP |
| styleguide.koelnmesse.net | 2024-09-20 | 18.161.6.52 |
| presskm.koelnmesse.net | 2024-03-15 | 3.163.24.58 |
| sso.tickets.koelnmesse.net | 2024-09-09 | 99.84.66.98 |
| www.koelnmesse.net | 2026-01-25 | 92.51.157.214 |
| my.koelnmesse.net | 2024-05-30 | 3.5.138.73 |