SSL/TLS Certificate Lookup

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

johnbx.com

SSL/TLS Certificate

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SSL/TLS Certificate for johnbx.com

Valid
Issued by (CA)
Let's Encrypt
Subject
johnbx.com
Valid from
Jun 15, 2026
Valid until
Sep 13, 2026 (53 days remaining)
Public key
RSA 2048-bit
Serial
06A4E738BC5738C4FA4E2AD104BC3CEBDDD5
SHA-256 fingerprint
F3:42:2E:A9:B1:55:0A:9F:0A:6E:80:C4:84:9F:D4:5E:22:BA:13:B4:43:BB:46:E8:F7:4F:F1:08:3B:6A:0A:93
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (5)
admin.johnbx.com, johnbx.com, mail.johnbx.com, webmail.johnbx.com, www.johnbx.com

Certificate Authority Authorization (CAA)

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