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 umet.cz
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- testmc.w42.eu
- Valid from
- Jun 21, 2026
- Valid until
- Sep 19, 2026 (60 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 059F99F123A3A063107C8A4CF5BD4549AB07
- SHA-256 fingerprint
- 1B:A4:C2:CE:EC:55:8E:35:54:95:12:8B:BC:A7:FB:30:D9:3D:7D:11:EE:47:62:01:38:EE:79:48:47:3C:EB:25
- 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.