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 exsim.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- exsim.jp
- Valid from
- Jul 4, 2026
- Valid until
- Oct 2, 2026 (72 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05DE20BBD66CDEAAE16512815500E4ED643A
- SHA-256 fingerprint
- 31:87:2D:C9:12:7E:CC:97:E5:66:AD:2A:35:0B:27:AD:89:F4:B1:1E:2F:6A:29:88:AE:E3:69:1C:B1:3E:FE:D3
- 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.