SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
lt-union.fr
SSL/TLS Certificate
SSL/TLS Certificate for lt-union.fr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- lt-union.fr
- Valid from
- Jul 29, 2026
- Valid until
- Oct 27, 2026 (53 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0512A12E74FCD9BFE044243A601AB4FED8CB
- SHA-256 fingerprint
- CD:FA:78:E0:ED:AB:F1:4D:0E:6A:09:CD:52:6C:E4:F7:D4:F5:CE:8E:F4:42:B8:C0:D2:13:B6:44:C3:48:3C:10
- 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 18, 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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