cedu.cz

.cz crawl

First seen 2026-05-16 · Last seen 2026-05-20 · ok HTTP/1.1 200 4858 ms crawled 2026-05-20

SK · 37.9.175.165 · AS51013 WebSupport s.r.o.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title: CEDU - Centrum pro demokratické učení
Description: CEDU podporuje učitele a jejich žáky v tom, jak pracovat s odpovědnost ve školním životě. Pomáháme zakládat žákovské parlamenty.
Canonical: https://cedu.cz/

Open Graph

url: https://cedu.cz/
title: CEDU - Centrum pro demokratické učení
locale: cs_CZ
site name: CEDU
description: CEDU podporuje učitele a jejich žáky v tom, jak pracovat s odpovědnost ve školním životě. Pomáháme zakládat žákovské parlamenty.

Technology

Server: openresty
CMS: WordPress

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (5)

fonts.googleapis.com×2
unpkg.com×2
www.googletagmanager.com×2
fonts.gstatic.com×1
maps.googleapis.com×1

Social

Contact

Email

Phone

Registration

Registrar

REG-INTERNET-CZ

Created

2008-12-09

Expires

2026-12-08 200 days left

Updated

2023-02-16

Name servers

ns.forpsi.cz
ns.forpsi.it
ns.forpsi.net

DNS records live

NS

ns.forpsi.cz
ns.forpsi.it
ns.forpsi.net

MX

0 aspmx.l.google.com
10 alt3.aspmx.l.google.com
10 alt4.aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com

Verified for

Google

Email authentication partial

SPF: v=spf1 include:_spf.google.com include:servers.mcsv.net ~all
softfail (~all)
DMARC: v=DMARC1; p=none; rua=mailto:31rb85uf7s@dmarc-reports.ecomailapp.com; fo=1; ri=86400;
policy: none (monitoring only)
DKIM: no key found at common selectors

Certificate (current)

R12

from 2026-05-12 to 2026-08-10

Expires in 81 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 55/100 Checked live page: https://cedu.cz/

present

content-security-policy
referrer-policy

findings

missing HSTS
missing frame protection
missing content type protection
missing Permissions Policy

Header values

referrer-policy: no-referrer-when-downgrade
content-security-policy: upgrade-insecure-requests