SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hs-bremen.de
SSL/TLS Certificate
SSL/TLS Certificate for hs-bremen.de
Valid- Issued by (CA)
- Hellenic Academic and Research Institutions CA
- Subject
- hs-bremen.de
- Valid from
- Dec 4, 2025
- Valid until
- Dec 4, 2026 (133 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 74D7CF2DC6CE4BECE3A4D83D6EAAC89A
- SHA-256 fingerprint
- E7:93:1E:E6:07:9A:8B:FF:4B:AA:26:20:37:EC:DA:CF:A8:4F:EE:AB:62:A1:FE:A9:9B:DE:A7:8C:B0:D2:8E:87
- Chain
- GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021
Certificate Authority Authorization (CAA)
CAA restricts issuance to harica.gr, letsencrypt.org, pki.dfn.de, sectigo.com; we couldn't map the serving CA (Hellenic Academic and Research Institutions CA) to one of these identifiers.
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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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