SSL Checker

howstuffworks.com

TLS 1.3 TLS_AES_128_GCM_SHA256

Leaf Certificate

Subject cdn-origin.hswinternal.com

Issuer Amazon RSA 2048 M04

Valid From Jul 17, 2026

Valid Until Jan 30, 2027 (167 days)

Algorithm SHA256-RSA

Subject Alternative Names

cdn-origin.hswinternal.comzooquizzes.com*.zooquizzes.comtravel.mapquest.com*.cdn.preview.hswinternal.comzoo.com*.howstuffworks.com*.zoo.comhowstuffworks.com

Intermediate

Subject Amazon RSA 2048 M04

Issuer Amazon Root CA 1

Valid From Aug 23, 2022

Valid Until Aug 23, 2030 (1468 days)

Algorithm SHA256-RSA

Intermediate

Subject Amazon Root CA 1

Issuer Starfield Services Root Certificate Authority - G2

Valid From May 25, 2015

Valid Until Dec 31, 2037 (4154 days)

Algorithm SHA256-RSA

Findings

✓ TLS 1.3 supported

✓ SSL certificate valid (167 days remaining)

✓ Certificate covers 9 domains (SANs)

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Security Headers

CSP, HSTS, X-Frame-Options grade for this site

DNS Lookup

Query A, AAAA, MX, TXT, NS, CNAME, and SOA records with authoritative timing.

Redirect Checker

Trace the full HTTP redirect chain, flag loops, and surface mixed-content downgrades.

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