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 gds.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.gds.cz
- Valid from
- Sep 6, 2026
- Valid until
- Dec 5, 2026 (86 days remaining)
- Public key
- EC 256-bit
- Serial
- 06FA63728727548CD0ECEB0DEB68C1E2B1D9
- SHA-256 fingerprint
- 8A:BE:ED:DC:30:9F:51:AA:42:03:95:B0:F5:AC:67:ED:50:D3:40:BB:80:09:DD:19:0C:85:89:77:7E:F8:2E:92
- 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.
This certificate has been served since Sep 5, 2026.
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This is today's certificate. Turn on monitoring and we'll watch gds.cz continuously, notifying you the moment anything moves across all three signals:
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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