indexo.dev

21stoleti.cz

.cz crawl

First seen 2026-05-16 · Last seen 2026-05-20 · ok HTTP/1.1 200 1335 ms crawled 2026-05-20

DE · 94.130.206.14 · AS24940 Hetzner Online GmbH

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
21stoleti.cz – VĚDA, KTERÁ VÁS BUDE BAVIT
Description
VĚDA, KTERÁ VÁS BUDE BAVIT
Language
cs
Canonical
https://21stoleti.cz
Feeds

Open Graph

url
https://21stoleti.cz
title
21stoleti.cz
image:url
https://21stoleti.cz/wp-content/themes/digicon-21/img/logo21.jpg
description
VĚDA, KTERÁ VÁS BUDE BAVIT

Technology

Server
nginx
CMS
WordPress
jQuery
3.6.0
Stack
PHP
Analytics
  • Google Tag Manager
Fonts
  • Google Fonts
Third-party hosts loaded (10)
  • rfapi.digicon.cz×16
  • cdn.jsdelivr.net×2
  • fonts.googleapis.com×2
  • rf-hobby.cz×2
  • cdn.cookie-script.com×1
  • cdn.onesignal.com×1
  • code.jquery.com×1
  • fonts.gstatic.com×1
  • unpkg.com×1
  • www.googletagmanager.com×1

Social

Registration

Registrar
REG-ACTIVE24
Created
2003-02-20
Expires
2027-02-19 274 days left
Updated
2025-08-26
Name servers
  • ns1.websupport.cz
  • ns2.websupport.cz
  • ns3.websupport.eu

DNS records live

NS
  • ns1.websupport.cz
  • ns2.websupport.cz
  • ns3.websupport.eu
MX
  • 11 mail.pk62.com
Verified for
  • Google

Email authentication weak

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

E7
from 2026-05-14 to 2026-08-12
Expires in 83 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://21stoleti.cz/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (18)

Linked from (4)