TLS 1.3 TLS_AES_128_GCM_SHA256
Leaf Certificate
Subject harpercollins.com
Issuer GeoTrust TLS RSA CA G1
Valid From Nov 5, 2025
Valid Until Dec 6, 2026 (112 days)
Algorithm SHA256-RSA
Subject Alternative Names
harpercollins.comwww.harpercollins.com
Intermediate
Subject GeoTrust TLS RSA CA G1
Issuer DigiCert Global Root G2
Valid From Nov 2, 2017
Valid Until Nov 2, 2027 (442 days)
Algorithm SHA256-RSA
Intermediate
Subject DigiCert Global Root G2
Issuer DigiCert Global Root CA
Valid From Jan 18, 2024
Valid Until Nov 9, 2031 (1911 days)
Algorithm SHA256-RSA
Findings
✓ TLS 1.3 supported
✓ SSL certificate valid (112 days remaining)
✓ Certificate covers 2 domains (SANs)
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