| Date | IP Address |
| 2016-12-28 | 23.4.8.186 (ClassC) |
| 2018-01-13 | 90.84.52.210 (ClassC) |
| 2018-02-15 | 23.220.96.98 (ClassC) |
| 2018-07-10 | 52.84.33.112 (ClassC) |
| 2018-07-10 | 52.84.33.118 (ClassC) |
| 2018-07-10 | 52.84.33.250 (ClassC) |
| 2018-07-10 | 52.84.33.88 (ClassC) |
| 2018-08-03 | 54.230.35.105 (ClassC) |
| 2018-08-03 | 54.230.35.25 (ClassC) |
| 2018-08-03 | 54.230.35.37 (ClassC) |
| 2018-08-03 | 54.230.35.51 (ClassC) |
| 2018-08-20 | 52.85.131.253 (ClassC) |
| 2018-08-20 | 52.85.131.37 (ClassC) |
| 2018-08-20 | 52.85.131.43 (ClassC) |
| 2018-08-20 | 52.85.131.193 (ClassC) |
| 2018-10-05 | 13.33.92.142 (ClassC) |
| 2018-10-05 | 13.33.92.156 (ClassC) |
| 2018-10-05 | 13.33.92.74 (ClassC) |
| 2020-06-09 | 54.230.209.95 (ClassC) |
| 2020-06-09 | 54.230.209.74 (ClassC) |
| 2020-10-22 | 99.84.191.42 (ClassC) |
| 2021-12-24 | 13.225.210.95 (ClassC) |
| 2024-08-29 | 18.161.6.53 (ClassC) |
| 2024-09-18 | 18.161.6.26 (ClassC) |
| 2024-11-18 | 18.161.6.32 (ClassC) |
| Date | Domain | IP |
| ftp.hartslagmetercenter.nl | 2024-10-24 | 18.161.6.53 |
| www.hartslagmetercenter.nl | 2024-08-13 | 18.161.6.26 |
| a.mx.hartslagmetercenter.nl | 2024-04-26 | 18.161.6.26 |