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=922228.cn
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
April 11, 2026
Valid Until
July 10, 2026 46 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
75:83:77:C3:D1:6B:41:3B:EE:5B:08:DE:34:AA:11:83:C2:22:F9:DD:10:A0:32:BA:FF:E3:59:A9:99:AC:64:45
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
potermore.com *.potermore.com *.123.potermore.com *.www.potermore.com

Other domains in certificate

922228.cn *.922228.cn *.demo3.922228.cn *.moban.922228.cn *.oozdrl.922228.cn *.qvj.922228.cn *.v9jl.922228.cn *.velr.922228.cn *.win.922228.cn *.yf.922228.cn
bet20play.casino *.bet20play.casino *.hostmaster.bet20play.casino
chemtoolfor.icu *.chemtoolfor.icu *.rustore.chemtoolfor.icu
*.1e701c2a-6248-4fc5-b798-46510e3fb3d3.dckdk.pro *.app.dckdk.pro *.backup.dckdk.pro dckdk.pro *.dckdk.pro *.docs.dckdk.pro *.external.dckdk.pro *.hostmaster.dckdk.pro *.intranet.dckdk.pro *.my.dckdk.pro *.portal.dckdk.pro *.public.dckdk.pro *.rustore.dckdk.pro *.share.dckdk.pro *.uat.dckdk.pro *.www.dckdk.pro
*.admin.freeonlineslotmachinegames.com *.cp.freeonlineslotmachinegames.com freeonlineslotmachinegames.com *.freeonlineslotmachinegames.com *.games.freeonlineslotmachinegames.com *.gmail.freeonlineslotmachinegames.com *.help.freeonlineslotmachinegames.com *.ms.freeonlineslotmachinegames.com *.sales.freeonlineslotmachinegames.com *.top.freeonlineslotmachinegames.com *.tourism.freeonlineslotmachinegames.com *.up.freeonlineslotmachinegames.com *.users.freeonlineslotmachinegames.com *.ww10.freeonlineslotmachinegames.com *.www-1.freeonlineslotmachinegames.com
greendragonguns.com *.greendragonguns.com *.ww25.greendragonguns.com *.ww38.greendragonguns.com
*.biz.kb6kq.com kb6kq.com *.kb6kq.com
*.b9909d6c-c4ce-4e00-aa51-ba82e800f724.missioninboxes.co missioninboxes.co *.missioninboxes.co *.www.missioninboxes.co
*.admin.postmastermails.co *.api.postmastermails.co *.app.postmastermails.co *.assets.postmastermails.co *.b5b477fb-58aa-4ed1-827b-d2d1b5fe8af2.postmastermails.co *.blog.postmastermails.co *.coqseyqzrrblog.postmastermails.co *.demo.postmastermails.co *.dev.postmastermails.co *.hostmaster.postmastermails.co postmastermails.co *.postmastermails.co *.shop.postmastermails.co *.staging.postmastermails.co *.test.postmastermails.co *.uyruhdev.postmastermails.co
*.ns2.recetatiramisu.info recetatiramisu.info *.recetatiramisu.info *.www.recetatiramisu.info
*.a.sosabetz.com *.dev.sosabetz.com sosabetz.com *.sosabetz.com
*.90fe.thinkeys.com *.gitlab.thinkeys.com thinkeys.com *.thinkeys.com