SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
alf-schule.at
SSL/TLS Certificate
SSL/TLS Certificate for alf-schule.at
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- alf-schule.at
- Valid from
- Jul 24, 2026
- Valid until
- Oct 22, 2026 (73 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05908C4C34D96AFCCB4DBD27C4F3165ED4C6
- SHA-256 fingerprint
- A6:06:65:BB:0A:30:C0:DE:00:C8:20:0E:39:5B:DC:43:1F:42:5B:05:73:AD:90:D6:FE:2E:B8:46:A0:69:ED:8D
- Chain
- YR1 → Root YR → 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
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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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