SSL/TLS Certificate Lookup

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

jychen.cn

SSL/TLS Certificate

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SSL/TLS Certificate for jychen.cn

Valid
Issued by (CA)
Let's Encrypt
Subject
www.jychen.cn
Valid from
Jun 19, 2026
Valid until
Sep 17, 2026 (58 days remaining)
Public key
RSA 2048-bit
Serial
05D93018B6DA71AA4752B4688508923402F9
SHA-256 fingerprint
7C:42:16:3E:49:4E:15:04:A4:2C:04:EF:A0:5B:4B:ED:FD:13:CB:D8:8A:9B:C8:82:96:E8:0A:90:BD:F1:DB:79
Chain
YR2 → Root YR → ISRG Root X1
Subject Alternative Names (2)
jychen.cn, www.jychen.cn

Certificate Authority Authorization (CAA)

The serving CA (Let's Encrypt) is authorized by this domain's CAA records (digicert.com, letsencrypt.org, sectigo.com).