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 umin.ac.jp

Hostname mismatch
Issued by (CA)
SECOM Trust Systems CO.,LTD.
Subject
center2.umin.ac.jp
Valid from
Jan 20, 2026
Valid until
Feb 19, 2027 (213 days remaining)
Public key
RSA 2048-bit
Serial
104400B51A908EEAC09BEE90A8CAF20B
SHA-256 fingerprint
EE:5D:16:72:43:15:A6:E2:8B:9C:FC:04:10:CA:A0:BD:CB:93:AE:C9:44:0C:A8:6B:BE:E9:17:78:F4:01:0E:9E
Chain
SECOM Passport for Web SR 3.0 CA
Subject Alternative Names (1)
center2.umin.ac.jp

Certificate Authority Authorization (CAA)

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