SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
osmitz-izera.cz
SSL/TLS Certificate
SSL/TLS Certificate for osmitz-izera.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.osmitz-izera.cz
- Valid from
- Jun 10, 2026
- Valid until
- Sep 8, 2026 (43 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 051D1B37F5F7F3309AB2B8C487000AA6A80A
- SHA-256 fingerprint
- B1:84:73:11:8E:58:15:18:7A:39:67:8C:21:AE:80:18:47:87:41:00:34:86:DC:12:A2:04:F5:D5:B6:16:C7:F4
- 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.
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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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