DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 1
Let's Encrypt logo Let's Encrypt

Certificate Information

Subject
CN=42577.co
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
April 26, 2026
Valid Until
July 25, 2026 58 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
DE:21:1F:7F:B7:A6:6C:35:7F:0F:D9:F1:62:47:06:39:BD:87:AC:87:FA:AB:5E:0F:9A:71:0B:71:6A:29:D6:22
Alternative Names
90 domains

Security Configuration

TLS Protocols
TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

HTTP Security Headers

Status
Strict-Transport-Security
Missing
Not configured
Content-Security-Policy
Missing
Not configured Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • Add X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

CAA Records (Certificate Authority Authorization)

CAA Records
Not Configured (Any CA can issue certificates)
CAA Issues
  • • No CAA records configured - any CA can issue certificates
Recommendations
  • • Implement CAA records to restrict which CAs can issue certificates for your domain
  • • This adds an extra layer of security against unauthorized certificate issuance
  • • Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
  • • Consider adding 'iodef' record to receive security incident reports

Subject Alternative Names

90 domains
tanhao.shop *.tanhao.shop *.sitemap.tanhao.shop *.sitemaps.tanhao.shop

Other domains in certificate

42577.co *.42577.co
*.4running.kayas.com *.ad.kayas.com *.adm.kayas.com *.adobexd.kayas.com *.api.kayas.com *.backup.kayas.com *.club.kayas.com *.co.kayas.com *.dereve.kayas.com *.dev.kayas.com *.ece.kayas.com *.hzcctryffgzjx.kayas.com *.igpremium.kayas.com kayas.com *.kayas.com *.mail.kayas.com *.mazaltov.kayas.com *.members.kayas.com *.mn.kayas.com *.mx.kayas.com *.net.kayas.com *.newdev.kayas.com *.oelgbikyh.kayas.com *.org.kayas.com *.perfectline.kayas.com *.premium.kayas.com *.privacy.kayas.com *.qa-notifications.kayas.com *.qxgfbzofvl.kayas.com *.refundmyhotel.kayas.com *.rustore.kayas.com *.so.kayas.com *.ssl.kayas.com *.test.kayas.com *.ttk.kayas.com *.vps.kayas.com *.vxouyrxxmc.kayas.com *.whatsappdev.kayas.com *.workfinder.kayas.com *.ww1.kayas.com *.ww16.kayas.com *.ww25.kayas.com *.wwwsubmit.kayas.com *.xpcxsfmmdgamgf.kayas.com *.zcfappbxtnct.kayas.com
*.admin.michiganav.com *.app.michiganav.com *.backup.michiganav.com *.blog.michiganav.com *.ci.michiganav.com *.crm.michiganav.com *.data.michiganav.com *.dev.michiganav.com *.help.michiganav.com *.hostmaster.michiganav.com *.intranet.michiganav.com michiganav.com *.michiganav.com *.notexistsadmin.michiganav.com *.notexistsstaging.michiganav.com *.portal.michiganav.com *.remote.michiganav.com *.shop.michiganav.com *.workflow.michiganav.com *.ww43.michiganav.com
*.archives.privatebankai.com privatebankai.com *.privatebankai.com *.redbusprimarydns.privatebankai.com *.redbussecondarydns.privatebankai.com
*.admin.skinfitness.com *.api.skinfitness.com *.app.skinfitness.com *.backend.skinfitness.com *.demo.skinfitness.com *.dev.skinfitness.com *.intelligence.skinfitness.com *.lego.skinfitness.com *.metric.skinfitness.com *.reports.skinfitness.com skinfitness.com *.skinfitness.com *.stats.skinfitness.com *.superset.skinfitness.com