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 runo.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.runo.cz
- Valid from
- Jun 25, 2026
- Valid until
- Sep 23, 2026 (64 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 051616236592722A1B442E9929A2CB5ADB91
- SHA-256 fingerprint
- 2C:90:C4:A2:2F:EE:EB:6E:FA:66:DA:04:C3:1B:1C:05:35:2B:3B:33:68:05:74:3B:C7:A7:AA:49:F1:27:81:30
- 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.