| Date | IP Address |
| 2021-01-07 | 13.227.37.55 (ClassC) |
| 2024-08-28 | 18.161.6.75 (ClassC) |
| 2025-05-09 | 18.161.6.20 (ClassC) |
| 2025-11-11 | 18.161.6.100 (ClassC) |
| Date | Domain | IP |
| mta1.feedback.berendsen.com | 2025-04-20 | 3.165.160.75 |
| ns2.feedback.berendsen.com | 2024-08-28 | 18.161.6.75 |
| mail6.feedback.berendsen.com | 2024-06-29 | 18.161.6.100 |
| mx7.feedback.berendsen.com | 2025-03-05 | 18.161.6.20 |
| antispam.feedback.berendsen.com | 2024-08-28 | 18.65.229.74 |
| o.feedback.berendsen.com | 2025-01-27 | 3.165.160.78 |
| authsmtp.feedback.berendsen.com | 2024-10-06 | 18.161.6.75 |
| s.feedback.berendsen.com | 2025-04-23 | 18.161.6.20 |
| s-eu.feedback.berendsen.com | 2024-11-01 | 3.165.160.75 |
| a.mx.feedback.berendsen.com | 2024-09-12 | 18.161.6.75 |
| box.feedback.berendsen.com | 2025-04-21 | 18.161.6.75 |