SSL/TLS Certificate Lookup

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

SSL/TLS Certificate for sis-synergy.net

Expired
Issued by (CA)
Let's Encrypt
Subject
www.sis.ingegneria.it
Valid from
Dec 7, 2020
Valid until
Mar 7, 2021 (expired 1970 days ago)
Public key
RSA 2048-bit
Serial
03AD71D8636EFB26F85E9F1FF25DCA689E71
SHA-256 fingerprint
6E:83:43:E8:7C:89:6F:EE:10:73:6F:23:1E:CA:C5:B3:80:AC:18:A0:C2:2E:80:FD:18:A1:04:CF:D5:D3:C0:41
Chain
R3 → ISRG Root X1
Subject Alternative Names (3)
new.sis.ingegneria.it, sis.ingegneria.it, www.sis.ingegneria.it

Certificate Authority Authorization (CAA)

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

This certificate has been served since Jul 26, 2026.

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TLS certificate

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