Open
Cached
·
just now
89/100
SECURITY SCORE
Certificate Information
Subject
CN=www.open-c.jp
Issuer
C=US, O=Google Trust Services, CN=WR3
Valid From
November 19, 2025
Valid Until
February 18, 2026
89 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
D9:24:8E:82:E9:CC:40:2A:6B:79:4B:5F:B3:83:69:F1:A5:63:0F:25:26:F1:74:BD:47:CC:53:F0:74:A4:9C:91
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
HTTP Security Headers
Status
Strict-Transport-Security
Present
max-age=31556926
Content-Security-Policy
Basic
script-src; style-src; font-src
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • 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
100 domains
www.cineradar.es
40komp.app
40komp.com
track.acumengpstrack.in
infra.agent.aeroglobe.pk
tickets.aicf.in
www.antecindustries.com
arcanedreamlab.com
www.asprecuperacao.com.br
sante.awooni.com
bestbuymall.pk
www.budbeerestobar.com
builders.mk
calibr.fr
www.cangroup.gmbh
captainshelm.io
www.captainshelm.io
careeher.com
www.ceareperu.org
www.cerrolargo.com.mx
revitameal.co.id
colomr.pm
trufa.comandera.com
www.fundx.cradx.com
shaoke.creativewiz.nl
cultivaitefutures.org
datingwithdentures.com
devtechplus.io
www.districtapps.com
dleongold.com
docpass.mx
www.doll.world
home.domainik.io
easternspices.uk
elephantplena.com
dev.filmyhq.com
noise.fluid.productions
preview.flutter.cn
folify.ir
merchant.foreverware.org
desarrollo.futureando.com.mx
devfest-2018.gdglille.org
www.glimsiaglobal.com
www.golfloungeborken.de
criarasas.groups.id
hanggeriq.com
www.hcadvisors.com.au
www.highwaydroptaxi.in
www.igdfoundation.org
inreply.in
jonathanandsofias.wedding
secure-sendy.joolen.com
admin.kawelibrary.com
kazpaolo.com
iei.kinfri.online
www.kvrator.de
laelboerdery.com
www.land-mark.in
leafcup.com
leazex.com
smart301.linistitul.ro
lmnauto.com
lvl17.co.uk
macrobar.app
admin.moonlandclub.com
www.mrglobal.ltd
mysporttech.org
admin.onejitsu.com
www.open-c.jp
optibit.ai
www.pedagogiareal.com
pinetutilities.support
protoporiaher.gr
www.redalpine.net
www.rentalaware.com
www.roamguide.live
www.rodenic.com
www.sesu.ai
smouladesk.smoulasoutez.cz
dev.socialtribes.io
www.sosfast.co.za
analysis.sqa-io.com
tabletopazores.pt
dhawal.tarunmahajan.com
tenshiko.vn
www.themomentum.works
my.widget.travelity.app
tugabrasil.com
tulipvariedades.com
unlock-that.com
www.ursaluna.studio
variatur.au
link4.vocepede.online
api.weatherteller.com
swd.where2or3aregathered.com
legal.whoapp.live
xs4f.com
ylab.app
yomolauncherpro.zenzy.io
zonelyze.com
Other domains in certificate