SSL/TLS Certificate Lookup

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

kolejarz.org

SSL/TLS Certificate

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SSL/TLS Certificate for kolejarz.org

Valid
Issued by (CA)
nazwa.pl Sp. z o.o.
Subject
kolejarz.org
Valid from
Jun 3, 2026
Valid until
Dec 2, 2026 (133 days remaining)
Public key
EC 384-bit
Serial
12CA2836723F181CE39BFBB8FD812EBD
SHA-256 fingerprint
4E:21:BD:C2:6A:36:F5:F3:F5:DB:B3:82:98:84:9A:CA:43:9B:9B:75:A2:9C:83:4D:90:F1:EE:51:50:A0:BA:48
Chain
nazwaSSL DV TLS G2 E29 CA → Certum EC-384 CA → Certum Trusted Network CA
Subject Alternative Names (2)
kolejarz.org, www.kolejarz.org

Certificate Authority Authorization (CAA)

CAA restricts issuance to certum.pl, letsencrypt.org; we couldn't map the serving CA (nazwa.pl Sp. z o.o.) to one of these identifiers.