SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
skupina-dek.cz
SSL/TLS Certificate
SSL/TLS Certificate for skupina-dek.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dek-as.cz
- Valid from
- Jul 22, 2026
- Valid until
- Oct 20, 2026 (89 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05E195DEBC688E76451FE5022F92D993CA4A
- SHA-256 fingerprint
- 39:F6:56:BF:65:00:59:54:13:4B:A8:93:14:55:11:ED:0F:19:57:53:BC:21:4D:8C:06:FC:D4:1B:3D:3C:ED:D3
- Chain
- YR2 → 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 skupina-dek.cz's certificate expiring
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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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