SSL/TLS Certificate Lookup

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

criticalthinking.org

SSL/TLS Certificate

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SSL/TLS Certificate for criticalthinking.org

Valid
Issued by (CA)
Sectigo Limited
Subject
www.criticalthinking.org
Valid from
Feb 11, 2026
Valid until
Feb 11, 2027 (206 days remaining)
Public key
RSA 2048-bit
Serial
FB51D2D0F3E826A90265B9F72F12CBCF
SHA-256 fingerprint
DA:6E:B0:D2:32:FE:42:76:ED:53:B8:79:5B:6C:42:92:F6:A0:9F:2A:73:69:9C:32:53:8B:F6:9D:8C:A1:3C:AE
Chain
Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Subject Alternative Names (2)
criticalthinking.org, www.criticalthinking.org

Certificate Authority Authorization (CAA)

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