SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
twelve-group.fr
SSL/TLS Certificate
SSL/TLS Certificate for twelve-group.fr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- twelve-group.fr
- Valid from
- Jun 30, 2026
- Valid until
- Sep 28, 2026 (45 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05723786B206E51D8E0B382E95321E7C48D4
- SHA-256 fingerprint
- 59:C4:AF:D8:F7:30:EA:ED:53:FF:9A:34:5A:8C:7A:B8:67:BC:1C:B2:B5:E2:BA:13:A6:11:D4:9B:E6:CF:8C:16
- 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.
This certificate has been served since Aug 8, 2026.
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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.
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