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 happo.cz
Expiring soon- Issued by (CA)
- Let's Encrypt
- Subject
- happo.cz
- Valid from
- May 14, 2026
- Valid until
- Aug 12, 2026 (21 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06C5BA31D88ECCD5DA3EB0B1CA9B3D799686
- SHA-256 fingerprint
- D5:AA:B4:96:35:BA:D5:96:01:D8:AF:63:09:21:9C:E3:41:F1:00:D8:43:D2:67:B9:72:79:5E:D8:5B:A1:20:9C
- Chain
- R12 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.