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=howtocalculate.it
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
February 03, 2026
Valid Until
May 04, 2026 79 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
99:53:E4:AC:BC:5B:5A:6B:56:80:25:D2:20:60:0E:4E:CB:12:2B:43:9D:41:11:80:57:5F:4A:FA:86:B0:1E:06
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
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
mecerwise.com *.mecerwise.com

Other domains in certificate

howtocalculate.it *.howtocalculate.it
howtodraw.it *.howtodraw.it
hypersonic.it *.hypersonic.it
i6zw.com *.i6zw.com
idivani.it *.idivani.it
iegmu.tv *.iegmu.tv
ieil15k.shop *.ieil15k.shop
ifif774.cc *.ifif774.cc
ignari.com *.ignari.com
illavoratore.it *.illavoratore.it
ilnovecento.it *.ilnovecento.it
ilrisparmiatore.it *.ilrisparmiatore.it
iltuofuturo.it *.iltuofuturo.it
ilvaticano.it *.ilvaticano.it
immobiliareveneto.it *.immobiliareveneto.it
increased.it *.increased.it
independentmusic.it *.independentmusic.it
indonesiani.it *.indonesiani.it
infantgearexchange.com *.infantgearexchange.com
informationsecurity.it *.informationsecurity.it
internetunited.it *.internetunited.it
invincible.it *.invincible.it
italianaenergetica.it *.italianaenergetica.it
jeansindustry.it *.jeansindustry.it
kiligsuper.com *.kiligsuper.com
l1b1st.com *.l1b1st.com
lacassandra.it *.lacassandra.it
lenders.it *.lenders.it
lepillole.it *.lepillole.it
linkandalanthor138.sbs *.linkandalanthor138.sbs
liquidartgallery.it *.liquidartgallery.it
livinghispromise.com *.livinghispromise.com
mangi.it *.mangi.it
mathclassroom.it *.mathclassroom.it
menorwomen.com *.menorwomen.com
mirabilis.it *.mirabilis.it
miscuglio.it *.miscuglio.it
mitologiagriega.org *.mitologiagriega.org
mmbx20.cc *.mmbx20.cc
mobiletarget.it *.mobiletarget.it
mpo99idhin.com *.mpo99idhin.com
mummersmardigras.com *.mummersmardigras.com
muru.it *.muru.it
nishu.it *.nishu.it