SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
osk-host.cz
SSL/TLS Certificate
SSL/TLS Certificate for osk-host.cz
Expiring soon- Issued by (CA)
- Let's Encrypt
- Subject
- *.osk-host.cz
- Valid from
- Aug 27, 2026
- Valid until
- Nov 25, 2026 (17 days remaining)
- Public key
- EC 256-bit
- Serial
- 06FB7338C4DBFD67BAB9014CE77C3CE2C05A
- SHA-256 fingerprint
- 7A:A0:FF:CB:A1:80:DC:3E:32:2C:09:8A:D4:3E:6F:54:CF:12:AE:AA:2F:55:8A:0E:F0:C7:56:63:4E:E7:99:B4
- Chain
- YE2 → 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.
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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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