SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
tu-chemnitz.de
SSL/TLS Certificate
SSL/TLS Certificate for tu-chemnitz.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- tu-chemnitz.de
- Valid from
- Nov 2, 2026
- Valid until
- Jan 31, 2027 (78 days remaining)
- Public key
- EC 384-bit
- Serial
- 068D6CB28C3DA9B7A8E61BAFFA1C1553AE35
- SHA-256 fingerprint
- E2:E8:42:16:98:B3:D6:3A:A5:BE:D3:03:C8:A4:F7:C1:91:95:32:6A:2A:40:0F:F7:00:F6:60:3F:2B:7C:85:2A
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (harica.gr, letsencrypt.org, pki.dfn.de).
We've observed 2 previous certificates for this host. This certificate has been served since Nov 10, 2026.
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Uptime
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DNS changes
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TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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