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 transitions-energetique.fr

Hostname mismatch
Issued by (CA)
Sectigo Limited
Subject
www.transitions-energetiques.fr
Valid from
Apr 17, 2026
Valid until
Oct 14, 2026 (62 days remaining)
Public key
RSA 2048-bit
Serial
30A71DE8CFAE9071A2A92642E8557399
SHA-256 fingerprint
AC:99:AE:B8:E8:28:6E:96:EC:2D:88:FF:84:F5:54:A7:32:1C:E0:30:63:DC:A9:1C:BD:B5:AD:D2:10:FA:DB:B7
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46
Subject Alternative Names (2)
transitions-energetiques.fr, www.transitions-energetiques.fr

Certificate Authority Authorization (CAA)

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

Never get surprised by transitions-energetique.fr's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch transitions-energetique.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.