SSL/TLS Certificate Lookup

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

kefei.me

SSL/TLS Certificate

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SSL/TLS Certificate for kefei.me

Expired
Issued by (CA)
Let's Encrypt
Subject
mail.shaoyu.me
Valid from
Nov 22, 2025
Valid until
Feb 20, 2026 (expired 152 days ago)
Public key
RSA 2048-bit
Serial
055A9102FB84FCFA41541D7CEF86B0D4FA37
SHA-256 fingerprint
D4:F8:F6:03:B8:A8:15:98:43:50:CF:04:61:82:D2:CA:A5:14:99:86:97:17:CC:8C:60:FF:49:E3:C7:E7:56:97
Chain
R12 → ISRG Root X1
Subject Alternative Names (6)
mail.shaoyu.me, mysql.shaoyu.me, vma.shaoyu.me, www.jun.cam, www.kefei.me, www.shaoyu.me

Certificate Authority Authorization (CAA)

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