SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sis-ma.it
SSL/TLS Certificate
SSL/TLS Certificate for sis-ma.it
Valid- Issued by (CA)
- Actalis S.p.A.
- Subject
- *.sis-ma.it
- Valid from
- Feb 25, 2026
- Valid until
- Mar 28, 2027 (206 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 50482231DDBE764E736533897BF4870E
- SHA-256 fingerprint
- 55:B5:44:D8:39:BF:7A:46:EC:45:C8:12:51:AF:DD:FB:FE:3B:AA:F5:66:08:C3:D0:0F:4F:03:D8:7A:D6:2E:FE
- Chain
- Actalis Domain Validation Server CA G3 → Actalis Authentication Root CA
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by sis-ma.it's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sis-ma.it continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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