4app.cz

.cz dns

First seen 2026-06-03 · Last seen 2026-06-04 · ok HTTP/1.1 200 567 ms crawled 2026-06-03

FR · 144.91.107.93 · AS51167 Contabo GmbH

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: 4APP.cz - Usilovně pracujeme na našem novém webu.
Description: 4APP.cz - nekonečně možností
Language: cs

Technology

Server: Apache

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (4)

fonts.googleapis.com×3
fonts.gstatic.com×1
www.google.com×1
www.googletagmanager.com×1

DNS records live

NS

ns.wedos.com
ns.wedos.cz
ns.wedos.eu
ns.wedos.net

MX

1 mail.4app.cz

Email authentication strong

SPF: v=spf1 a mx ip4:89.221.209.229 ip4:62.138.1.124 ip4:185.129.138.6 ~all
softfail (~all)
DMARC: v=DMARC1; p=quarantine; rua=mailto:dmarc@4app.cz;
policy: quarantine
DKIM: no key found at common selectors

Certificate (current)

R13

from 2026-04-28 to 2026-07-27

Expires in 52 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.4app.cz/

findings

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