SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dmd-electric.fr
SSL/TLS Certificate
SSL/TLS Certificate for dmd-electric.fr
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- www.groupe-dmd.fr
- Valid from
- Sep 7, 2026
- Valid until
- Dec 6, 2026 (83 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0642A857640976B67DC9EB7EDE6F6137FAEF
- SHA-256 fingerprint
- 4D:5D:45:A1:B1:47:D4:FC:73:3B:E9:EA:45:AA:CC:58:21:CA:E3:A7:C5:D4:B4:B8:77:1A:18:49:61:DD:CF:19
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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