SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for french-connexion.fr

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
dns40.domaine.fr
Valid from
Jun 29, 2026
Valid until
Sep 27, 2026 (40 days remaining)
Public key
RSA 2048-bit
Serial
05D4095E0A419BEA02BECA3B39AB8ADE0094
SHA-256 fingerprint
F0:11:CE:FA:2B:C0:9C:D6:CD:18:BC:A0:C3:A3:09:36:BC:18:CF:89:EA:D8:88:F5:77:9F:3D:5B:1F:FB:77:BD
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (1)
dns40.domaine.fr

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

This certificate has been served since Aug 8, 2026.

Never get surprised by french-connexion.fr's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch french-connexion.fr 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, 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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.