SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sis-synergy.net
SSL/TLS Certificate
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
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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DNS changes
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TLS certificate
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