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=28cf.cc
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
April 16, 2026
Valid Until
July 15, 2026 54 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
48:25:86:19:78:28:A3:F1:B4:34:34:81:96:6F:7D:48:2F:4E:13:FE:1F:03:50:3E:20:17:86:8E:3A:0F:3E:C2
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
celularfacil.sbs *.celularfacil.sbs

Other domains in certificate

28cf.cc *.28cf.cc
40612.locker *.40612.locker
9041.win *.9041.win
a5v7.cc *.a5v7.cc
aahbk.today *.aahbk.today
agoraiinnovationhub.com *.agoraiinnovationhub.com
allinmedya.com *.allinmedya.com
argodry.com *.argodry.com
asia888api.com *.asia888api.com
bloodfarm.news *.bloodfarm.news
buyingpower.xyz *.buyingpower.xyz
casx.bet *.casx.bet
cell-phone-cl-31.sbs *.cell-phone-cl-31.sbs
charminx.com *.charminx.com
chestnutchoosing.com *.chestnutchoosing.com
choixo88.fit *.choixo88.fit
clumi.com *.clumi.com
comprar-casa-con-facilidades-de-pago-colombia.sbs *.comprar-casa-con-facilidades-de-pago-colombia.sbs
contentics.com *.contentics.com
corporate-holiday-party-venue431.click *.corporate-holiday-party-venue431.click
crystalwaupshaut.com *.crystalwaupshaut.com
cygolf.com *.cygolf.com
data-analytics-ae-5943.click *.data-analytics-ae-5943.click
dfcz.cc *.dfcz.cc
dmqkwtw100.vip *.dmqkwtw100.vip
ggear.org *.ggear.org
goexcpl.com *.goexcpl.com
hvn7778.com *.hvn7778.com
hyperfuelinvest.com *.hyperfuelinvest.com
micedge.store *.micedge.store
mopko.net *.mopko.net
qyc97.com *.qyc97.com
surtt.town *.surtt.town
teqawards.com *.teqawards.com
theadventuremedia.com *.theadventuremedia.com
thevestusstudio.business *.thevestusstudio.business
toolstoda.com *.toolstoda.com
tvszu.town *.tvszu.town
virtualscratchoffs.com *.virtualscratchoffs.com
vrrlaw.com *.vrrlaw.com
y7x5.com *.y7x5.com
yes77tar.info *.yes77tar.info
yinlong.art *.yinlong.art
z6383r6.top *.z6383r6.top