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 jean-gagne.fr

Valid
Issued by (CA)
Let's Encrypt
Subject
jean-gagne.fr
Valid from
Oct 25, 2026
Valid until
Jan 23, 2027 (74 days remaining)
Public key
EC 256-bit
Serial
053D73F53212DA3946612DF0AC2EEEC1FB0A
SHA-256 fingerprint
3E:A8:09:4B:C6:16:96:CE:1C:1E:AF:8F:0F:15:E9:AA:D3:3E:E8:24:A2:D0:6E:D5:2A:EE:9B:23:C0:EB:11:7D
Chain
YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (1)
jean-gagne.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 Oct 11, 2026.

Never get surprised by jean-gagne.fr's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch jean-gagne.fr continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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.

Monitor this certificate free

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