SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

jaytech.cz

SSL/TLS Certificate

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SSL/TLS Certificate for jaytech.cz

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
nejlepsihity.cz
Valid from
Jun 7, 2026
Valid until
Sep 5, 2026 (46 days remaining)
Public key
RSA 2048-bit
Serial
06583C9B5CF0D59C126259492F43E47BD90D
SHA-256 fingerprint
BD:2F:A8:41:00:FA:66:BD:DF:48:66:3E:C4:2B:D5:A6:A2:16:17:A9:F4:CF:D6:08:24:8E:69:A4:D0:07:01:C8
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
nejlepsihity.cz, www.nejlepsihity.cz

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.