SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
cse-opal.fr
SSL/TLS Certificate
SSL/TLS Certificate for cse-opal.fr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.cse-opal.fr
- Valid from
- Oct 26, 2026
- Valid until
- Jan 24, 2027 (69 days remaining)
- Public key
- EC 256-bit
- Serial
- 06987A2DE13E0842934AF303C9D0969299EA
- SHA-256 fingerprint
- 55:4A:6A:56:B0:79:38:6B:D4:E9:41:8A:4A:20:70:E0:7C:FB:BF:01:01:F9:7C:53:1D:A9:5B:4F:D8:70:0F:12
- Chain
- YE2 → 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.
We've observed 1 previous certificate for this host. This certificate has been served since Nov 14, 2026.
Never get surprised by cse-opal.fr's certificate expiring
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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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