SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kotsu-daigaku.jp
SSL/TLS Certificate
SSL/TLS Certificate for kotsu-daigaku.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- kotsu-daigaku.jp
- Valid from
- Jun 19, 2026
- Valid until
- Sep 17, 2026 (56 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05C5011CA2BA131691EA66286220CE1B2136
- SHA-256 fingerprint
- AA:05:65:81:9B:DA:62:94:A0:BC:2A:DC:BB:B9:5F:5B:2F:6C:B1:7E:AD:C4:49:02:35:76:F7:55:EF:18:55:B7
- 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.
This certificate has been served since Jul 22, 2026.
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Uptime
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DNS changes
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TLS certificate
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