SSL/TLS Certificate Lookup

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

cis.gov.pl

SSL/TLS Certificate

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SSL/TLS Certificate for cis.gov.pl

Expiring soon
Issued by (CA)
Let's Encrypt
Subject
cis.gov.pl
Valid from
May 14, 2026
Valid until
Aug 12, 2026 (21 days remaining)
Public key
RSA 2048-bit
Serial
050C3B561E37940E483CE9B1B465F5A08E46
SHA-256 fingerprint
71:29:58:5A:E5:B9:91:9D:AC:14:44:0B:2F:92:8D:AB:1C:69:EC:B1:99:64:15:50:84:B6:97:71:19:BB:9D:35
Chain
R12 → ISRG Root X1
Subject Alternative Names (3)
cis.gov.pl, helpdesk.cis.gov.pl, www.cis.gov.pl

Certificate Authority Authorization (CAA)

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