SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
key-one.it
SSL/TLS Certificate
SSL/TLS Certificate for key-one.it
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- key-one.it
- Valid from
- Oct 24, 2026
- Valid until
- Jan 22, 2027 (71 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 064DBE423D47CC65CA723EDD55BA08250808
- SHA-256 fingerprint
- 12:CA:A5:A3:3F:7B:9C:B9:0C:29:FC:FE:24:D7:F5:01:11:6C:1E:4C:BE:86:8E:78:3D:50:95:58:50:86:00:3A
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by key-one.it's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch key-one.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, CNAME, TXT 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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