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=hvacoptimization.com
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
April 14, 2026
Valid Until
July 13, 2026 55 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
56:C3:05:6F:99:51:D8:56:64:01:8F:A9:D0:DA:68:AB:AD:2B:51:C0:06:96:D8:9C:7E:D0:9B:E1:63:52:A5:38
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
bzb.com.au *.bzb.com.au

Other domains in certificate

303zz.xyz *.303zz.xyz *.admin.303zz.xyz *.api.303zz.xyz *.app.303zz.xyz *.aws.303zz.xyz *.dev.303zz.xyz *.ww25.303zz.xyz *.ww38.303zz.xyz *.www.303zz.xyz *.xyz.303zz.xyz
ar-sha.com *.ar-sha.com *.git.ar-sha.com *.m.ar-sha.com *.miss-id.ar-sha.com *.sitemaps.ar-sha.com *.vpn.ar-sha.com *.ww12.ar-sha.com *.www.ar-sha.com *.wwww.ar-sha.com
bornleader.com.au *.bornleader.com.au *.random.bornleader.com.au
careformine.com *.careformine.com *.remote.careformine.com *.supersets.careformine.com
devilengine.org *.devilengine.org *.ww25.devilengine.org
dispensary.au *.dispensary.au
*.admin.emotionwedding.it *.dev.emotionwedding.it emotionwedding.it *.emotionwedding.it
healingestrangedrelationships.org *.healingestrangedrelationships.org *.ww25.healingestrangedrelationships.org
hvacoptimization.com *.hvacoptimization.com *.stage.hvacoptimization.com
indocolmek.com *.indocolmek.com
*.hostmaster.infl.it infl.it *.infl.it *.www.infl.it
kleinlove.club *.kleinlove.club *.m.kleinlove.club *.mail.kleinlove.club *.wildcard.kleinlove.club *.ww25.kleinlove.club
*.backend.mininghash.cc mininghash.cc *.mininghash.cc *.nc-ph-0667-10.mininghash.cc *.ww25.mininghash.cc
nordvpn.club *.nordvpn.club *.ww25.nordvpn.club
omegle.com.au *.omegle.com.au *.test.omegle.com.au
*.git.poggers.me *.paktool.poggers.me poggers.me *.poggers.me *.static.poggers.me *.ww25.poggers.me *.www.poggers.me
*.admin.tebi.it *.api.tebi.it *.backend.tebi.it *.dashboard.tebi.it *.demo.tebi.it *.dev.tebi.it *.forecast.tebi.it *.research.tebi.it *.superset.tebi.it tebi.it *.tebi.it
vladelecnomera.com *.vladelecnomera.com *.ww25.vladelecnomera.com *.ww38.vladelecnomera.com