| Date | IP Address |
| 2025-05-10 | 104.18.4.49 (ClassC) |
| 2025-09-07 | 104.18.5.49 (ClassC) |
| 2025-09-20 | 104.16.178.131 (ClassC) |
| 2026-01-29 | 40.85.168.83 (ClassC) |
| Date | Domain | IP |
| diagnosis101.welchallyn.com | 2025-07-30 | 104.18.4.49 |
| students-d1.welchallyn.com | 2025-09-07 | 20.106.159.105 |
| students-s1.welchallyn.com | 2025-05-10 | 104.18.4.49 |
| blog.welchallyn.com | 2025-12-13 | 72.52.253.57 |
| emeai.welchallyn.com | 2025-11-05 | 104.18.5.49 |
| gmail.welchallyn.com | 2024-12-18 | 142.251.215.243 |
| spotvision.welchallyn.com | 2026-01-29 | 18.235.88.180 |
| students.welchallyn.com | 2025-04-02 | 104.18.5.49 |
| www.welchallyn.com | 2025-09-02 | 104.18.4.49 |