SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
fh-kalender.de
SSL/TLS Certificate
SSL/TLS Certificate for fh-kalender.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.fh-kalender.de
- Valid from
- Jul 19, 2026
- Valid until
- Oct 17, 2026 (81 days remaining)
- Public key
- EC 384-bit
- Serial
- 05DB3ABDE0B2045825A8F959B993D7695B0C
- SHA-256 fingerprint
- 82:76:E6:83:17:B9:1F:2F:60:20:76:F6:D0:61:42:A3:42:BB:09:62:CF:54:79:16:6F:7C:B6:B1:CF:54:18:56
- Chain
- YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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Uptime
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
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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