SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

ots.ac.jp

SSL/TLS Certificate

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SSL/TLS Certificate for ots.ac.jp

Valid
Issued by (CA)
Let's Encrypt
Subject
www.ots.ac.jp
Valid from
Jun 12, 2026
Valid until
Sep 10, 2026 (50 days remaining)
Public key
RSA 2048-bit
Serial
05D10022512DE70D314774ADC8F63376B9C2
SHA-256 fingerprint
EA:54:05:42:20:D1:EB:6F:CE:7D:1E:55:E0:2A:F5:C8:C0:A2:AA:E5:D1:61:2F:0A:0C:B9:97:EE:49:76:A0:37
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
ots.ac.jp, www.ots.ac.jp

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.