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Certificate Chain Deep Dive

Comprehensive certificate chain validation and CRL revocation analysis.

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Valid Chain Revoked Certificate Incomplete Chain

revoked-isrgrootx1.letsencrypt.org

3/7/2026, 12:07:58 pm UTC

Certificate Chain Validation

❌ Certificate chain has issues that may prevent browsers from trusting it.

Issues:

  • Certificate 'revoked-isrgrootx1.letsencrypt.org' is REVOKED

Certificate Details

End Entity

Leaf Certificate
Download PEM
Subject: revoked-isrgrootx1.letsencrypt.org
Issuer: R13
Serial (Decimal): 0x0568BEED02A1B44C25C43DE494C6CF7C549B
Serial (Hex): 0568BEED02A1B44C25C43DE494C6CF7C549B

Valid From: 2026-02-25 17:38:36

Valid Until: 2026-05-26 17:38:35

Signature: RSA-SHA256

Version: 3

CRL Revocation Status:

❌ Certificate is REVOKED (found in CRL)

CRL size: 216774 bytes

CRL URL

http://r13.c.lencr.org/28.crl

Root CA

Download PEM
Subject: R13
Issuer: ISRG Root X1
Serial (Decimal): 119635429456979344322213464088047616773
Serial (Hex): 5A00F212D8D4B480F3924157EA298305

Valid From: 2024-03-13 00:00:00

Valid Until: 2027-03-12 23:59:59

Signature: RSA-SHA256

Version: 3