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 on-it.it
Valid- Issued by (CA)
- Actalis S.p.A.
- Subject
- *.on-it.it
- Valid from
- Jun 5, 2026
- Valid until
- Dec 21, 2026 (77 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 2051D3F5DBF780FE70290BD58E39D15E
- SHA-256 fingerprint
- 19:06:61:33:31:7A:E9:C2:C5:74:C2:71:D1:80:52:46:F2:9B:7E:82:18:04:40:33:D8:FD:69:FC:7A:5D:E7:88
- 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.
This certificate has been served since Aug 26, 2026.
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Uptime
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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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