SSL/TLS Certificate Lookup

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

speccy.cz

SSL/TLS Certificate

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SSL/TLS Certificate for speccy.cz

Valid
Issued by (CA)
Let's Encrypt
Subject
speccy.cz
Valid from
May 25, 2026
Valid until
Aug 23, 2026 (33 days remaining)
Public key
RSA 2048-bit
Serial
06B69DDF03076942235D1688065FDCC193C2
SHA-256 fingerprint
6B:00:21:1D:37:A0:8D:D9:16:BF:7B:D9:9C:A6:EC:BD:1B:BB:F2:76:5C:A9:5B:E6:F1:D9:83:7B:46:EA:43:53
Chain
R13 → ISRG Root X1
Subject Alternative Names (2)
speccy.cz, www.speccy.cz

Certificate Authority Authorization (CAA)

The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).