| Date | IP Address |
| 2018-01-29 | 63.238.216.225 (ClassC) |
| 2018-06-21 | 165.254.94.241 (ClassC) |
| 2018-10-24 | 23.219.36.146 (ClassC) |
| 2019-01-03 | 65.153.18.170 (ClassC) |
| 2019-03-10 | 23.56.175.147 (ClassC) |
| 2019-05-18 | 23.56.175.178 (ClassC) |
| 2025-01-08 | 136.144.162.130 (ClassC) |
| Date | Domain | IP |
| webmail.proqr.com | 2024-12-22 | 52.96.113.194 |
| ir.proqr.com | 2025-01-08 | 136.144.162.130 |
| www.proqr.com | 2024-12-22 | 136.144.162.130 |