duolingo.com — Certificate History

View SSL certificate change history for duolingo.com.

Last Checked: 2026-06-07T16:00:04Z · Issuer: Amazon

ObservedValid FromValid ToIssuerFingerprint
2026-06-06T10:16:36Z2025-11-25 00:00:002026-12-24 23:59:59Amazona05caad9f59e9b73…

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