SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
kogakkan-u.ac.jp
SSL/TLS Certificate
SSL/TLS Certificate for kogakkan-u.ac.jp
Valid- Issued by (CA)
- GlobalSign nv-sa
- Subject
- www.kogakkan-u.ac.jp
- Valid from
- Aug 8, 2025
- Valid until
- Sep 9, 2026 (48 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0CDD22EA3FD11A1F0F04B1D8
- SHA-256 fingerprint
- 53:37:F4:3A:40:5B:05:0C:ED:38:25:35:F1:0D:54:D9:97:F6:33:D9:F6:A3:C0:D1:D3:0F:67:39:AE:4E:48:66
- Chain
- GlobalSign GCC R3 DV TLS CA 2020 → GlobalSign
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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Uptime
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DNS changes
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TLS certificate
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