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 danyk.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- danyk.cz
- Valid from
- Jun 18, 2026
- Valid until
- Sep 16, 2026 (57 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05DFD64FD13CF065B2D8B72E3BD1E2F0C950
- SHA-256 fingerprint
- 47:44:D3:F4:05:3F:12:27:9D:BF:49:39:49:6B:74:FA:65:59:A0:04:99:CF:4D:7F:4F:0E:63:67:E1:26:D7:31
- 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.