SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kdt-technik.ch
SSL/TLS Certificate
SSL/TLS Certificate for kdt-technik.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- kdt-technik.ch
- Valid from
- Jun 28, 2026
- Valid until
- Sep 26, 2026 (40 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0544D72313FF54A00EA68162BEBFCD9BB0C8
- SHA-256 fingerprint
- A1:E1:63:BD:3F:DE:26:14:FF:58:A1:E3:CC:E9:01:E6:AE:CF:8B:93:B4:CD:4C:1D:E5:A1:E7:76:71:66:2F:BC
- 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.
Never get surprised by kdt-technik.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kdt-technik.ch 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.