| Date | IP Address |
| 2021-01-13 | 81.7.161.163 (ClassC) |
| 2026-02-05 | 157.250.163.24 (ClassC) |
| Date | Domain | IP |
| mail12.sejrolsen.com | 2025-06-09 | 157.250.163.24 |
| mail3.sejrolsen.com | 2026-02-05 | 157.250.163.24 |
| mail.comune.sejrolsen.com | 2025-06-08 | 157.250.163.24 |
| antispam.sejrolsen.com | 2026-02-05 | 157.250.163.24 |