SSL/TLS Certificate Lookup

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

zk-school.com

SSL/TLS Certificate

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SSL/TLS Certificate for zk-school.com

Valid
Issued by (CA)
Let's Encrypt
Subject
zk-school.com
Valid from
May 23, 2026
Valid until
Aug 21, 2026 (30 days remaining)
Public key
EC 256-bit
Serial
0529E669707574A23F2CA95585A444C619D1
SHA-256 fingerprint
93:38:51:1C:18:FF:68:04:66:2F:B0:1D:DE:6A:68:0B:E8:96:96:FD:B9:99:A3:B2:F1:14:63:6A:C1:28:95:40
Chain
E8 → ISRG Root X1
Subject Alternative Names (2)
www.zk-school.com, zk-school.com

Certificate Authority Authorization (CAA)

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