SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
khk-it.cz
SSL/TLS Certificate
SSL/TLS Certificate for khk-it.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- khk-it.cz
- Valid from
- Oct 9, 2026
- Valid until
- Jan 7, 2027 (57 days remaining)
- Public key
- EC 256-bit
- Serial
- 05609AFB2FEFDF4FE263FB73F78F8B2B7CFB
- SHA-256 fingerprint
- C7:D2:59:E9:9D:6E:BD:E0:21:07:DA:DB:B5:CE:96:06:6E:8E:47:07:DC:FC:0F:EC:E0:54:4F:FA:DD:9D:96:6A
- Chain
- YE1 → 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.
Never get surprised by khk-it.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch khk-it.cz 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, 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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