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 lyon.edu
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- lyon.edu
- Valid from
- May 21, 2026
- Valid until
- Aug 19, 2026 (28 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05103372BFF8341CC69655F35E1D2F338C53
- SHA-256 fingerprint
- FF:69:17:0B:AC:11:2D:8A:92:2C:EF:82:03:D3:E0:29:C2:82:4D:AB:23:1C:4A:8F:73:B3:33:A2:71:C7:AE:A0
- Chain
- R13 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.