SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kta-technika.cz
SSL/TLS Certificate
SSL/TLS Certificate for kta-technika.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.ktatechnika.cz
- Valid from
- Jun 30, 2026
- Valid until
- Sep 28, 2026 (68 days remaining)
- Public key
- RSA 3072-bit
- Serial
- 058E26A39E472CAE59401D332D42643B769F
- SHA-256 fingerprint
- C6:41:DF:9B:68:C8:4D:62:BD:E6:1B:AE:C6:D0:58:DE:FA:9D:59:11:BE:38:C1:68:36:E7:05:A4:75:7A:8D:B9
- 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
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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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