SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
tour-duguesclin.fr
SSL/TLS Certificate
SSL/TLS Certificate for tour-duguesclin.fr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- tour-duguesclin.fr
- Valid from
- Sep 26, 2026
- Valid until
- Dec 25, 2026 (48 days remaining)
- Public key
- EC 256-bit
- Serial
- 06368E0EE3F514D635E41C1AED50C89DD2B3
- SHA-256 fingerprint
- 6E:49:09:B3:58:39:C2:3D:AF:E2:27:E2:D9:6C:5A:A6:A9:7E:E6:E3:19:7C:EF:E1:7E:63:27:77:FE:F5:B0:EC
- Chain
- YE1 → Root YE → ISRG Root X2 → 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
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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