| Date | IP Address |
| 2024-12-20 | 198.246.102.49 (ClassC) |
| 2025-03-04 | 23.210.244.197 (ClassC) |
| 2025-08-30 | 23.216.147.202 (ClassC) |
| 2026-02-28 | 23.216.147.201 (ClassC) |
| Date | Domain | IP |
| knowitsniosh.niosh.gov | 2024-12-20 | 198.246.102.49 |
| knowits.niosh.gov | 2024-12-20 | 198.246.102.49 |
| www.niosh.gov | 2024-11-26 | 198.246.102.49 |