SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
lucien.it
SSL/TLS Certificate
SSL/TLS Certificate for lucien.it
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- lucien.it
- Valid from
- Jan 20, 2026
- Valid until
- Apr 20, 2026 (expired 107 days ago)
- Public key
- RSA 2048-bit
- Serial
- 06AF04B8A6C1F1B75327D856A2A1BD7668AE
- SHA-256 fingerprint
- F2:A7:C1:81:03:CE:BC:07:19:DE:0B:E2:3E:01:3D:51:AB:0A:70:A9:2D:8E:AD:25:28:C3:79:4D:6C:C6:23:6C
- Chain
- R12 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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