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=stromtrechner.de
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
March 20, 2026
Valid Until
June 18, 2026 32 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
A3:17:DF:CE:0C:C3:97:4F:90:FF:F8:34:CE:35:14:C8:67:97:B5:10:C7:E4:2A:B0:5D:6C:E6:C1:48:D8:C3:56
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 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

89 domains
architectsstudio.com *.architectsstudio.com *.admin.architectsstudio.com *.www.architectsstudio.com

Other domains in certificate

278club.com.au *.278club.com.au *.ww16.278club.com.au *.ww38.278club.com.au
ahoo.cm *.ahoo.cm *.group.ahoo.cm *.hs.ahoo.cm *.mail.ahoo.cm *.mail2.ahoo.cm *.ww38.ahoo.cm
andromedasjournal.com *.andromedasjournal.com *.ipv6.andromedasjournal.com
authentichr.com.au *.authentichr.com.au *.ww25.authentichr.com.au *.ww38.authentichr.com.au
batool.com *.batool.com *.haj.batool.com
foodlover.tw *.foodlover.tw *.s20211008.foodlover.tw *.ww38.foodlover.tw
greendolphinkaikoura.com *.greendolphinkaikoura.com *.ww25.greendolphinkaikoura.com *.ww38.greendolphinkaikoura.com
irishsettter.com *.irishsettter.com *.ww25.irishsettter.com
johnshadegg.com *.johnshadegg.com
*.new.norikos.com norikos.com *.norikos.com
pccislamofobia.org *.pccislamofobia.org
phressia.com *.phressia.com
*.hostmaster.pittstop.de pittstop.de *.pittstop.de
pricehunt.au *.pricehunt.au
qclink.net *.qclink.net *.ww16.qclink.net *.ww17.qclink.net *.ww25.qclink.net *.ww38.qclink.net
rentaltrailer.com.au *.rentaltrailer.com.au *.ww25.rentaltrailer.com.au
*.rus.rusemb.sk rusemb.sk *.rusemb.sk *.vww.rusemb.sk *.ww25.rusemb.sk
stromtrechner.de *.stromtrechner.de
*.mail.sydneyfurnitureremovals.com.au sydneyfurnitureremovals.com.au *.sydneyfurnitureremovals.com.au
*.86d680f6-975b-41ea-ac29-72af758e238c.thesunplaza.fund *.admin.thesunplaza.fund *.api.thesunplaza.fund *.demo.thesunplaza.fund *.dev.thesunplaza.fund *.hostmaster.thesunplaza.fund *.samara.thesunplaza.fund *.staging.thesunplaza.fund *.test.thesunplaza.fund thesunplaza.fund *.thesunplaza.fund
treatme.gifts *.treatme.gifts *.ww25.treatme.gifts
*.random.wgn.com.au wgn.com.au *.wgn.com.au *.ww25.wgn.com.au
xluba1.com *.xluba1.com