SSL/TLS Certificate Lookup

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

sematext.com

SSL/TLS Certificate

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SSL/TLS Certificate for sematext.com

Valid
Issued by (CA)
Amazon
Subject
*.sematext.com
Valid from
Jan 4, 2026
Valid until
Feb 1, 2027 (196 days remaining)
Public key
RSA 2048-bit
Serial
049573D597577690EA54D627A75AD437
SHA-256 fingerprint
2F:92:F6:81:1C:D8:AC:55:56:B6:5C:E5:F6:46:F2:3C:AC:2B:28:61:24:9D:2C:6C:08:96:D6:81:3E:3C:27:78
Chain
Amazon RSA 2048 M01 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Subject Alternative Names (2)
*.sematext.com, sematext.com

Certificate Authority Authorization (CAA)

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