SSL/TLS Certificate Lookup

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

cez.gov.pl

SSL/TLS Certificate

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SSL/TLS Certificate for cez.gov.pl

Valid
Issued by (CA)
Asseco Data Systems S.A.
Subject
*.cez.gov.pl
Valid from
Mar 31, 2026
Valid until
Oct 16, 2026 (87 days remaining)
Public key
RSA 2048-bit
Serial
13E59D7FCE20A3CDD6CF6E2FEE53459D
SHA-256 fingerprint
B1:11:5D:12:61:F3:BC:FC:89:00:78:96:85:C3:60:A6:CD:6A:D4:C1:8C:07:90:31:AE:F9:61:33:24:68:F1:E9
Chain
Certum OV TLS G2 R39 CA → Certum Trusted Root CA
Subject Alternative Names (2)
*.cez.gov.pl, cez.gov.pl

Certificate Authority Authorization (CAA)

CAA restricts issuance to certum.pl; we couldn't map the serving CA (Asseco Data Systems S.A.) to one of these identifiers.