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 ef5.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ef5.cz
- Valid from
- Jul 1, 2026
- Valid until
- Sep 29, 2026 (70 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 055672B5F153FBEEA77F61623C8692056BBA
- SHA-256 fingerprint
- D1:32:96:16:B9:12:7D:99:D8:47:4E:0F:DA:05:67:35:6F:C5:7E:81:0F:42:BE:54:E0:17:2A:0D:79:DA:7A:44
- 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.