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 nepobezi.cz

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
default.web4u.cz
Valid from
Jun 9, 2026
Valid until
Sep 7, 2026 (48 days remaining)
Public key
RSA 2048-bit
Serial
0635155F07092C8984705BC82E2AB555FB71
SHA-256 fingerprint
C8:FD:04:85:01:FF:79:0A:36:66:91:5F:17:76:69:58:0E:29:50:00:55:80:97:01:A2:21:CC:8D:E4:A7:3A:6D
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (1)
default.web4u.cz

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.