| Date | IP Address |
| 2020-08-28 | 99.86.116.80 (ClassC) |
| 2020-09-18 | 99.86.111.52 (ClassC) |
| 2023-11-01 | 99.84.66.52 (ClassC) |
| 2024-04-16 | 99.84.66.74 (ClassC) |
| 2024-12-12 | 3.163.158.13 (ClassC) |
| 2025-04-12 | 35.164.113.238 (ClassC) |
| 2025-05-25 | 52.39.127.35 (ClassC) |
| 2025-07-11 | 54.201.95.155 (ClassC) |
| 2025-08-02 | 35.160.193.88 (ClassC) |
| 2025-08-10 | 54.189.187.160 (ClassC) |
| 2025-08-31 | 44.225.191.22 (ClassC) |
| 2026-01-05 | 44.233.181.112 (ClassC) |
| Date | Domain | IP |
| m.email.horizontherapeutics.com | 2026-01-02 | 44.235.221.7 |
| apps.horizontherapeutics.com | 2025-09-02 | 15.197.134.95 |
| www.horizontherapeutics.com | 2023-11-01 | 99.84.66.52 |