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 psyna.cz
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- psyna.cz
- Valid from
- Jun 18, 2026
- Valid until
- Sep 16, 2026 (57 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 053480D78CCE16F641AC870303BD1005AD11
- SHA-256 fingerprint
- 62:EC:DD:EE:B9:FD:ED:08:88:DF:A5:4C:79:B3:44:ED:86:8C:AE:6E:6B:3C:B0:38:7A:96:71:50:D0:7C:28:11
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org, pki.goog, sectigo.com).