← Back to Rankings
Is Quest Diagnostics (questdiagnostics.com) Down?
UP — Responding normally
Last checked: 4h ago
Avg TTFB
4868ms
#326 in S&P 500
Total Load
696ms
Uptime
14.3%
Based on 7 checks
Response Time — Recent Checks
About This Site
Quest Diagnostics (DGX)
Sector: Health Care
Ranked #326 overall in S&P 500
Ranked #41 in Health Care
Recent Checks
| Time | Status | TTFB | Total |
|---|---|---|---|
| 2/20/2026, 4:51:03 PM | ✓ Up | 4868 ms | 4871 ms |
| 2/20/2026, 12:58:00 PM | ✗ Down | — ms | 0 ms |
| 2/20/2026, 12:54:52 PM | ✗ Down | — ms | 0 ms |
| 2/20/2026, 12:53:00 PM | ✗ Down | — ms | 0 ms |
| 2/20/2026, 12:36:18 PM | ✗ Down | — ms | 0 ms |
| 2/20/2026, 12:32:55 PM | ✗ Down | — ms | 0 ms |
| 2/20/2026, 12:32:30 PM | ✗ Down | — ms | 0 ms |