DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Certificate Information

Subject
CN=valuableclasses.global
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
February 12, 2026
Valid Until
May 13, 2026 89 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
01:EC:72:77:FC:B5:23:A3:11:B2:24:D2:4D:E8:C0:A2:80:C9:4D:80:C5:38:DB:C1:A1:00:6F:DF:D2:3B:B5:4A
Alternative Names
89 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
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

89 domains
singercenter.com *.singercenter.com *.admin.singercenter.com *.api.singercenter.com *.app.singercenter.com *.apps.singercenter.com *.assets.singercenter.com *.backup.singercenter.com *.blog.singercenter.com *.dashboard.singercenter.com *.fkpxtqzuyvformation.singercenter.com *.formation.singercenter.com *.gate.singercenter.com *.gateway.singercenter.com *.gp.singercenter.com *.hostmaster.singercenter.com *.m.singercenter.com *.mail.singercenter.com *.mailer.singercenter.com *.members.singercenter.com *.portal.singercenter.com *.ra.singercenter.com *.rd.singercenter.com *.rdp.singercenter.com *.rds.singercenter.com *.rdweb.singercenter.com *.remoteapp.singercenter.com *.remoto.singercenter.com *.rustore.singercenter.com *.secure.singercenter.com *.shop.singercenter.com *.sitemaps.singercenter.com *.ssl.singercenter.com *.staging.singercenter.com *.stg.singercenter.com *.test.singercenter.com *.uhzufrd.singercenter.com *.v1.singercenter.com *.v2.singercenter.com *.vpn1.singercenter.com *.vpn2.singercenter.com *.vpnssl.singercenter.com *.web.singercenter.com *.webvpn.singercenter.com *.ww25.singercenter.com *.wzlinqa.singercenter.com

Other domains in certificate

*.0ecef421-8549-4499-bf16-3c21d0adbe01.toys-birthdays.com *.7079aed4-0d4e-4f70-8dd8-92e75536525a.toys-birthdays.com *.app.toys-birthdays.com *.cloud.toys-birthdays.com *.docs.toys-birthdays.com *.hostmaster.toys-birthdays.com *.intranet.toys-birthdays.com *.rd.toys-birthdays.com *.rds.toys-birthdays.com *.remote.toys-birthdays.com *.share.toys-birthdays.com toys-birthdays.com *.toys-birthdays.com *.vpn.toys-birthdays.com *.www.toys-birthdays.com
*.api.valuableclasses.global *.kozhwgestao.valuableclasses.global *.m.valuableclasses.global *.ndfsiapi.valuableclasses.global valuableclasses.global *.valuableclasses.global
veramassageanddayspa.com *.veramassageanddayspa.com
*.f3d1df56-69d9-4209-a103-fe461a7a8751.wkf.us *.hykjy37k.wkf.us *.m.wkf.us *.out.wkf.us *.rds.wkf.us *.sitemaps.wkf.us *.test.wkf.us *.whm.wkf.us wkf.us *.wkf.us *.wqzrkdemo.wkf.us *.www.wkf.us
*.87ab5.xn--9kq250gwzi.xyz *.d.xn--9kq250gwzi.xyz *.lkzdx.xn--9kq250gwzi.xyz *.nktjv.xn--9kq250gwzi.xyz *.s28s9.xn--9kq250gwzi.xyz *.wsct4.xn--9kq250gwzi.xyz xn--9kq250gwzi.xyz *.xn--9kq250gwzi.xyz