SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
m-zone.cz
SSL/TLS Certificate
SSL/TLS Certificate for m-zone.cz
Untrusted chain- Issued by (CA)
- Let's Encrypt
- Subject
- mnetstudenka.cz
- Valid from
- Jul 21, 2026
- Valid until
- Oct 19, 2026 (37 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05D32A734B22978462BB5E70E80BFD798DA2
- SHA-256 fingerprint
- 41:E0:34:DF:98:53:BC:BB:43:0C:BD:2D:C4:F9:1A:86:53:9F:00:7E:DE:4A:52:DF:CF:84:4D:95:94:89:FE:73
- Chain
- —
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 Jul 28, 2026.
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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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