| Date | IP Address |
| 2023-06-13 | 104.18.39.219 (ClassC) |
| 2026-02-19 | 104.18.17.195 (ClassC) |
| Date | Domain | IP |
| mail1.gundersenhealth.org | 2025-08-05 | 204.69.147.17 |
| forms.gundersenhealth.org | 2026-02-19 | 104.18.17.195 |
| providers.gundersenhealth.org | 2025-08-18 | 45.60.233.26 |