SSL Checker

phongtamphuoctien.vn

TLS 1.3 TLS_AES_128_GCM_SHA256

Leaf Certificate

Subject phongtamphuoctien.vn

Issuer YR2

Valid From Jun 21, 2026

Valid Until Sep 19, 2026 (20 days)

Algorithm SHA256-RSA

Subject Alternative Names

phongtamphuoctien.vnwww.phongtamphuoctien.vn

Intermediate

Subject YR2

Issuer Root YR

Valid From Sep 3, 2025

Valid Until Sep 2, 2028 (735 days)

Algorithm SHA256-RSA

Intermediate

Subject Root YR

Issuer ISRG Root X1

Valid From May 13, 2026

Valid Until Sep 2, 2032 (2196 days)

Algorithm SHA256-RSA

Intermediate

Subject YR2

Issuer Root YR

Valid From Sep 3, 2025

Valid Until Sep 2, 2028 (735 days)

Algorithm SHA256-RSA

Intermediate

Subject Root YR

Issuer ISRG Root X1

Valid From May 13, 2026

Valid Until Sep 2, 2032 (2196 days)

Algorithm SHA256-RSA

Findings

✓ TLS 1.3 supported

⚠ SSL certificate expires in 20 days

✓ Certificate covers 2 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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