SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zakruta.cz
SSL/TLS Certificate
SSL/TLS Certificate for zakruta.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- zakruta.cz
- Valid from
- Oct 1, 2026
- Valid until
- Dec 30, 2026 (56 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0658FEAC79A5D1B97EEA9B3131A6A5452EF3
- SHA-256 fingerprint
- BB:22:F8:01:68:BB:7A:8D:CB:49:2C:F3:57:E2:2E:92:E8:F8:3C:22:8E:DB:E5:EE:03:F9:15:C1:0C:F2:93:1C
- 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.
This certificate has been served since Sep 15, 2026.
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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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