SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for s-bau.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.s-bau.cz
- Valid from
- Nov 10, 2026
- Valid until
- Feb 8, 2027 (87 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 052E11217E8C932238E5688C6B2C2E290C73
- SHA-256 fingerprint
- 7F:55:0A:10:E3:E4:A1:E7:B7:B6:DF:3F:9F:6B:68:A6:FC:73:5A:AD:00:EE:53:6C:90:67:01:DF:79:05:B8:1B
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Sep 18, 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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