SSL/TLS Certificate Lookup

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

zasklem.cz

SSL/TLS Certificate

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SSL/TLS Certificate for zasklem.cz

Valid
Issued by (CA)
Let's Encrypt
Subject
www.zasklem.com
Valid from
Jun 30, 2026
Valid until
Sep 28, 2026 (68 days remaining)
Public key
RSA 2048-bit
Serial
051A8146F11E0ED684312343F85D2E517227
SHA-256 fingerprint
37:53:EB:48:F8:18:6F:CC:7A:03:77:88:D1:FB:72:88:B7:42:B4:69:38:DD:91:0E:B2:A3:EE:4E:52:F1:72:5B
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (4)
www.zasklem.com, www.zasklem.cz, zasklem.com, zasklem.cz

Certificate Authority Authorization (CAA)

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