SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kts-kern.si
SSL/TLS Certificate
SSL/TLS Certificate for kts-kern.si
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- www.kts-kern.si
- Valid from
- Sep 14, 2026
- Valid until
- Dec 13, 2026 (87 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05F70DF688101EA48CEB245B3620F9C76EB7
- SHA-256 fingerprint
- 39:FE:1D:B5:21:DE:21:82:16:4D:BB:52:CE:EF:6B:FA:17:98:2D:70:82:1A:3A:0E:D3:A3:81:D3:A6:B5:66:2E
- 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 kts-kern.si's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch kts-kern.si 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.