SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
s-w-a-t.cz
SSL/TLS Certificate
SSL/TLS Certificate for s-w-a-t.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.s-w-a-t.cz
- Valid from
- Nov 13, 2026
- Valid until
- Feb 11, 2027 (88 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 051F1BE4EB8E73004903BE62A4518F8AFF2C
- SHA-256 fingerprint
- 1F:93:FC:3C:97:EE:1F:E7:E4:73:8A:EB:1C:11:B7:2D:51:14:37:89:DC:08:62:DD:71:89:E3:CB:F9:EE:9F:04
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 24, 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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