SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
geosan-development.cz
SSL/TLS Certificate
SSL/TLS Certificate for geosan-development.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.geosan-development.cz
- Valid from
- Sep 3, 2026
- Valid until
- Dec 2, 2026 (48 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 050FB196DEE78792E994D55615E939FB95E8
- SHA-256 fingerprint
- 18:45:94:3D:7D:1E:78:80:30:A9:29:0F:74:A0:B1:C0:DD:46:94:AC:72:DD:27:54:70:C9:E9:66:4D:68:F5:48
- 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 Oct 2, 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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