SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

tu-dortmund.org

SSL/TLS Certificate

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SSL/TLS Certificate for tu-dortmund.org

Valid

Issued by (CA): Let's Encrypt
Subject: tu-dortmund.eu
Valid from: Jun 6, 2026
Valid until: Sep 4, 2026 (44 days remaining)
Public key: RSA 2048-bit
Serial: 05189C4B93A1C8D1B48C677323F097EB42F0
SHA-256 fingerprint: 18:92:E7:25:AC:69:DD:A7:D1:8D:C5:F0:44:68:BA:4B:F6:80:F8:6D:42:41:48:71:18:9D:28:DC:65:B9:9C:47
Chain: YR1 → Root YR → ISRG Root X1

Subject Alternative Names (7)

notfall-vm.tu-dortmund.de, notfall.tu-dortmund.de, tu-dortmund.eu, tu-dortmund.org, www.notfall.tu-dortmund.de, www.tu-dortmund.eu, www.tu-dortmund.org

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.