DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Certificate Information

Subject
CN=51kanpian.pro
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
December 27, 2025
Valid Until
March 27, 2026 44 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
43:A9:45:E0:A9:03:0A:A8:CE:B4:62:10:72:60:DC:00:83:94:AB:6A:26:4C:61:FF:EC:DF:1B:F0:0F:F7:65:07
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
grepao.com *.grepao.com *.09c1f81.grepao.com *.521e.grepao.com *.528003.grepao.com *.5bf.grepao.com *.6076.grepao.com *.6c8.grepao.com *.732.grepao.com *.84.grepao.com *.a5.grepao.com *.b5395396.grepao.com *.b831.grepao.com *.f0.grepao.com

Other domains in certificate

51kanpian.pro *.51kanpian.pro
andersen.studio *.andersen.studio *.ashley.andersen.studio *.global.andersen.studio *.pay.andersen.studio *.ww38.andersen.studio
bedlingtonterrier.com *.bedlingtonterrier.com
betapp591283.xyz *.betapp591283.xyz
crazybattle.io *.crazybattle.io *.whitepaper.crazybattle.io *.ww25.crazybattle.io *.ww38.crazybattle.io
digiwolf.store *.digiwolf.store
dogoftheweek.com *.dogoftheweek.com *.www.dogoftheweek.com
labaradors.com *.labaradors.com
malteese.com *.malteese.com *.pay.malteese.com *.ww12.malteese.com
optumfiancial.com *.optumfiancial.com
*.bat.pauta.online *.blog.pauta.online *.office.pauta.online *.painel.pauta.online pauta.online *.pauta.online *.prueba.pauta.online
petscript.com *.petscript.com
*.app.profitsuite.co *.com.profitsuite.co profitsuite.co *.profitsuite.co *.tbd.profitsuite.co
*.account.repricer.online *.art.repricer.online *.com.repricer.online *.dev.repricer.online repricer.online *.repricer.online *.smtp3.repricer.online
speakology.studio *.speakology.studio
*.random.spitzchow.com spitzchow.com *.spitzchow.com
thestorynetwork.co *.thestorynetwork.co *.ww38.thestorynetwork.co
tosaken.com *.tosaken.com
*.track.traffic-seller.club traffic-seller.club *.traffic-seller.club
usdogbreeders.com *.usdogbreeders.com
*.cicd-dev.visionpolitica.info visionpolitica.info *.visionpolitica.info
wheatenterrior.com *.wheatenterrior.com *.ww12.wheatenterrior.com
*.ww38.zinmanhwa.io zinmanhwa.io *.zinmanhwa.io