| Date | IP Address |
| 2021-05-29 | 104.125.2.145 (ClassC) |
| 2022-01-07 | 23.42.158.9 (ClassC) |
| 2022-03-11 | 23.213.53.66 (ClassC) |
| 2022-09-08 | 104.119.189.17 (ClassC) |
| 2024-06-17 | 23.44.175.172 (ClassC) |
| 2026-01-27 | 23.192.230.136 (ClassC) |
| 2026-01-31 | 23.192.230.151 (ClassC) |
| Date | Domain | IP |
| images.bounceback.chiesiusa.com | 2026-01-31 | 23.192.230.149 |
| mail.chiesiusa.com | 2025-08-10 | 66.193.79.244 |
| email.chiesiusa.com | 2025-06-05 | 34.102.239.211 |
| go.chiesiusa.com | 2015-07-14 | 108.168.254.139 |
| image.rarediseases.chiesiusa.com | 2024-06-17 | 23.44.175.172 |
| www.chiesiusa.com | 2016-10-18 | 104.196.163.97 |