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 univ-catholyon.fr

Valid
Issued by (CA)
Hellenic Academic and Research Institutions CA
Subject
univ-catholyon.fr
Valid from
Nov 4, 2026
Valid until
May 22, 2027 (192 days remaining)
Public key
RSA 2048-bit
Serial
6E2661323E5D2B169A890F654B12809B
SHA-256 fingerprint
43:71:D1:B7:EB:C0:F0:DD:84:EC:34:9D:E0:CD:89:A8:38:EE:BA:44:D7:7D:6A:48:AA:54:64:A1:14:A3:96:36
Chain
GEANT TLS RSA 1 → HARICA TLS RSA Root CA 2021 → Hellenic Academic and Research Institutions RootCA 2015
Subject Alternative Names (2)
*.univ-catholyon.fr, univ-catholyon.fr

Certificate Authority Authorization (CAA)

CAA restricts issuance to harica.gr, letsencrypt.org; we couldn't map the serving CA (Hellenic Academic and Research Institutions CA) to one of these identifiers.

This certificate has been served since Jul 24, 2026.

Never get surprised by univ-catholyon.fr's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch univ-catholyon.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.