SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for k-sa.de
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- *.krone-telematics-systems.com
- Valid from
- Oct 15, 2026
- Valid until
- Jan 13, 2027 (67 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0612627CD8CC492DE809525640B87DD64528
- SHA-256 fingerprint
- 48:20:CC:A8:55:30:7D:D7:82:FF:C1:AF:A5:CA:14:E5:88:36:E0:E9:C1:86:04:25:10:92:47:B6:8C:A1:01:C5
- 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.
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Uptime
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DNS changes
We watch NS, MX, CAA, CNAME, TXT 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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