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 omnio.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- omnio.cz
- Valid from
- Jun 20, 2026
- Valid until
- Sep 18, 2026 (59 days remaining)
- Public key
- EC 384-bit
- Serial
- 055E1857901493C211C7658CD85A0B5CD552
- SHA-256 fingerprint
- 03:2E:1B:76:DD:FC:B6:DF:3F:35:37:91:EE:14:0F:8B:28:75:FF:24:F0:E3:64:A1:06:26:2E:27:E8:EF:0D:86
- Chain
- YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.