kellnerfoundation.cz

HTML metadata

Title: The Kellner Family Foundation
Description: The Renáta and Petr Kellner family foundation was founded in 2009 with the aim of supporting primarily long-term educational projects intended for primary school pupils and their teachers, secondary school students and university students.
Language: en

Open Graph

title: The Kellner Family Foundation
locale: en
site name: The Kellner Family Foundation
description: The Renáta and Petr Kellner family foundation was founded in 2009 with the aim of supporting primarily long-term educational projects intended for primary school pupils and their teachers, secondary school students and university students.

Technology

CDN: Vercel
CMS: Next.js
JS framework: Next.js, React

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (4)

www.datocms-assets.com×13
fonts.gstatic.com×2
fonts.googleapis.com×1
www.googletagmanager.com×1

Social

Contact

Email

info@kellnerfoundation.cz

Phone

+420702255806

Registration

Registrar

REG-WEBGLOBE

Created

2009-02-20

Expires

2027-02-19 263 days left

Updated

2026-04-24

Name servers

ns1-03.azure-dns.com
ns2-03.azure-dns.net
ns3-03.azure-dns.org
ns4-03.azure-dns.info

DNS records live

NS

ns1-03.azure-dns.com
ns2-03.azure-dns.net
ns3-03.azure-dns.org
ns4-03.azure-dns.info

MX

0 kellnerfoundation-cz.mail.protection.outlook.com

Email authentication strong

SPF

v=spf1 include:spf.protection.outlook.com include:spfi.mkii.net include:spf.smartemailing.cz -all

strict (-all)

DMARC

v=DMARC1; p=reject; pct=100; rua=mailto:abuse@ppfgroup.net; ruf=mailto:abuse@ppfgroup.net; fo=1

policy: reject (enforced)

DKIM

selector1: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA6LKxbiv6VEgNfFiGkkbCi+y9LoKNyy8N124X03sos7dOUB5h5m6m3zjersbX37xnOVpUgOW7mgOSh7…

selectors probed

Certificate (current)

R12

from 2026-05-28 to 2026-08-26

Expires in 87 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 95/100 Checked live page: https://www.kellnerfoundation.cz/en

present

strict-transport-security
content-security-policy
x-frame-options
x-content-type-options
referrer-policy
permissions-policy

findings

CSP allows unsafe inline scripts/styles

Header values

referrer-policy: no-referrer-when-downgrade
x-frame-options: DENY
permissions-policy: geolocation=(self), sync-xhr=(self), fullscreen=(self "https://*.youtube.com" "https://*.vimeo.com")
x-content-type-options: nosniff
content-security-policy: default-src https: blob: data: 'unsafe-inline' 'unsafe-eval' http://localhost:3000 http://localhost:3001 http://localhost:3002 ws://localhost:3000/ ws://localhost:3002/
strict-transport-security: max-age=31536000; includeSubDomains; preload