SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
groupe-jef.com
SSL/TLS Certificate
SSL/TLS Certificate for groupe-jef.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- elearning.masterformation.gf
- Valid from
- Aug 29, 2026
- Valid until
- Nov 27, 2026 (61 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05DB15B4636937AD3D0CE7EF8F685E072FFD
- SHA-256 fingerprint
- 96:58:FE:D4:85:01:F1:23:2B:07:38:E2:66:6C:61:FC:96:C3:6E:66:0F:19:A9:2A:14:9C:71:06:5F:B8:E8:E7
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by groupe-jef.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch groupe-jef.com 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.