SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
cer-alexandre-dumas.fr
SSL/TLS Certificate
SSL/TLS Certificate for cer-alexandre-dumas.fr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- cer-alexandre-dumas.fr
- Valid from
- Oct 26, 2026
- Valid until
- Jan 24, 2027 (75 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05502BB92FE4E13675045933C97219D6C1C3
- SHA-256 fingerprint
- 53:61:86:C2:D0:A3:47:BC:B5:86:84:C1:D6:67:33:35:6B:38:DC:F2:7E:D9:A5:3E:90:B3:06:3D:24:6B:1F:79
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 2 previous certificates for this host. This certificate has been served since Nov 3, 2026.
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Uptime
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DNS changes
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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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