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 mmgr.cz
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- www.datakomplet.cz
- Valid from
- Jun 19, 2026
- Valid until
- Sep 17, 2026 (58 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05685E9EDE555C8AEA951BF34B41B33617CB
- SHA-256 fingerprint
- 99:DA:5E:CF:61:B7:00:88:A3:13:71:39:02:49:C1:0E:CA:98:06:72:26:A8:CB:A3:3F:C8:82:02:C0:FC:DB:18
- 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.