SSL/TLS Certificate Lookup

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

kopro.com.pl

SSL/TLS Certificate

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SSL/TLS Certificate for kopro.com.pl

Valid
Issued by (CA)
Let's Encrypt
Subject
kopro.com.pl
Valid from
Jun 17, 2026
Valid until
Sep 15, 2026 (55 days remaining)
Public key
EC 256-bit
Serial
05F2A56BD5796A04B9EF4C0D424EF80C1BEB
SHA-256 fingerprint
F7:18:2C:6A:B0:25:99:F3:85:71:6B:81:42:65:D7:9D:28:34:1D:F6:A4:E0:71:9B:32:7A:A0:E6:CE:B0:E5:CA
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
kopro.com.pl, www.kopro.com.pl

Certificate Authority Authorization (CAA)

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