SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
okna-hned.cz
SSL/TLS Certificate
SSL/TLS Certificate for okna-hned.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- okna-hned.cz
- Valid from
- Jul 25, 2026
- Valid until
- Oct 23, 2026 (29 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 051B90603DE64A7E8A651D0B1F42E4075D93
- SHA-256 fingerprint
- D7:1F:13:5B:52:CE:F4:80:37:98:A7:79:4A:D7:78:C2:4E:7D:D0:E8:58:95:B5:E0:F3:50:60:18:EC:60:4E:98
- 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 okna-hned.cz's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch okna-hned.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, 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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