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 osy.ch
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- osy.ch
- Valid from
- Jun 18, 2026
- Valid until
- Sep 16, 2026 (57 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06B03F973AB48654A1EC1D9D8DC8401DFB5B
- SHA-256 fingerprint
- 4D:A6:3B:56:55:B9:BD:7D:A4:5C:40:A2:43:7D:DE:95:3E:C7:68:62:18:6B:04:38:CD:D0:C6:D7:BA:81:F4:76
- 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.