SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
nk-construction.fr
SSL/TLS Certificate
SSL/TLS Certificate for nk-construction.fr
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- nk-construction.fr
- Valid from
- Sep 5, 2026
- Valid until
- Dec 4, 2026 (61 days remaining)
- Public key
- EC 256-bit
- Serial
- 06DE1AE541230AC9939D84C5A06D8D765810
- SHA-256 fingerprint
- B7:B5:92:4B:88:42:CC:CA:24:1C:34:35:4D:42:A1:BA:B7:0E:92:AD:F2:68:6F:BF:CF:69:15:46:35:73:09:90
- Chain
- YE2 → Root YE → ISRG Root X2 → 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 Oct 4, 2026.
Never get surprised by nk-construction.fr's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch nk-construction.fr 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.