DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Certificate Information

Subject
CN=kiz441dar.site
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
February 01, 2026
Valid Until
May 02, 2026 79 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
44:FE:B7:67:0A:2E:0F:09:CE:ED:98:5C:35:E5:76:C8:B6:D4:93:BE:5C:E1:73:CC:FE:1E:D4:C5:75:1E:32:78
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
optimizationtutor.com *.optimizationtutor.com

Other domains in certificate

alajaj.com *.alajaj.com *.art.alajaj.com *.free.alajaj.com *.vestibular.alajaj.com *.ww16.alajaj.com
anneville.com *.anneville.com *.ww1.anneville.com
flechsig.com *.flechsig.com *.webmail.flechsig.com
*.dd1084c5-01c1-4026-bb8d-8bf3c89c7c2f.kiz441dar.site kiz441dar.site *.kiz441dar.site
muhadarati.com *.muhadarati.com
nbuc.me *.nbuc.me
ngvwy.gdn *.ngvwy.gdn
nitzke.com *.nitzke.com
nolimitsupplements.com *.nolimitsupplements.com
oamanager.com *.oamanager.com
oeemy.gdn *.oeemy.gdn
optiq-dspm.org *.optiq-dspm.org
oyt.me *.oyt.me
*.hostmaster.pedorra.com pedorra.com *.pedorra.com
pemanaoilandgas.com *.pemanaoilandgas.com
*.caballeros.photoshelter.co *.dgjames.photoshelter.co photoshelter.co *.photoshelter.co *.psecn.photoshelter.co
policymarket.com.au *.policymarket.com.au
ppdqt.net *.ppdqt.net
prismbookkeeping.com *.prismbookkeeping.com
productfolks.com *.productfolks.com
rankcheck.org *.rankcheck.org
remf.in *.remf.in
remotepcsupport.com.au *.remotepcsupport.com.au
sainz.org *.sainz.org
samsunsinavkoleji.com *.samsunsinavkoleji.com
sosmobilemechanic.com.au *.sosmobilemechanic.com.au
teelz.app *.teelz.app
tennessee-ai.com *.tennessee-ai.com
thebitcointimechain.com *.thebitcointimechain.com
trevianum.com *.trevianum.com
tsrbu.pro *.tsrbu.pro
uhdmovies.foo *.uhdmovies.foo
uwy37.top *.uwy37.top
waveenergy.com.au *.waveenergy.com.au
wwwc7ty.cc *.wwwc7ty.cc
xnxx.guide *.xnxx.guide
zaluknij.xyz *.zaluknij.xyz
zobyp.academy *.zobyp.academy