SSL/TLS Certificate Lookup

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

lis.net.pl

SSL/TLS Certificate

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SSL/TLS Certificate for lis.net.pl

Valid
Issued by (CA)
Let's Encrypt
Subject
lis.net.pl
Valid from
Jun 12, 2026
Valid until
Sep 10, 2026 (50 days remaining)
Public key
RSA 2048-bit
Serial
05861D3CB42D5A88BB866E3D7975A0866818
SHA-256 fingerprint
CC:DA:D6:86:98:4B:6C:CA:8C:3C:D3:09:03:4E:DF:09:FF:7F:2C:E3:46:30:2A:DF:60:E6:C9:8F:31:D2:55:77
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (7)
cloud.lis.net.pl, deuter.lis.net.pl, lis.net.pl, neutron.lis.net.pl, proton.lis.net.pl, www.cloud.lis.net.pl, www.lis.net.pl

Certificate Authority Authorization (CAA)

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