SSL/TLS Certificate Lookup

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

proftax.pl

SSL/TLS Certificate

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SSL/TLS Certificate for proftax.pl

Valid
Issued by (CA)
Let's Encrypt
Subject
proftax.pl
Valid from
Jun 7, 2026
Valid until
Sep 5, 2026 (46 days remaining)
Public key
RSA 2048-bit
Serial
05D40475A89803393D4D3DF7FF4C2A738967
SHA-256 fingerprint
F0:14:48:AD:D9:7B:35:31:B2:08:95:96:43:07:7A:DE:CD:72:8D:1A:BB:7F:42:49:72:3B:4C:D3:37:D7:28:C2
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
proftax.pl, www.proftax.pl

Certificate Authority Authorization (CAA)

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