letenskyzamecek.cz

.cz crawl

First seen 2026-05-18 · Last seen 2026-05-25 · ok HTTP/1.1 200 3994 ms crawled 2026-05-22

CZ · 81.91.86.11 · AS39790 Web4U s.r.o.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Language: cs

Open Graph

url: https://letenskyzamecek.cz/

Technology

Server: openresty
PHP: 7.4.33 end of life
jQuery: 1.11.1 known XSS (<3.5)
Stack: PHP

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (6)

code.jquery.com×3
fonts.googleapis.com×1
s3.eu-central-1.amazonaws.com×1
www.bookiopro.com×1
www.facebook.com×1
www.googletagmanager.com×1

Social

Registration

Registrar

REG-WEB4U

Created

2000-09-25

Expires

2026-09-25 116 days left

Updated

2012-04-04

Name servers

ns2.web4u.cz
ns.web4u.cz

DNS records live

NS

ns.web4u.cz
ns2.web4u.cz

MX

10 mx1.mailchannels.net
10 mx2.mailchannels.net

Email authentication weak

SPF: v=spf1 include:_spf.web4u.cz ~all
softfail (~all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

R12

from 2026-03-26 to 2026-06-24

Expires in 23 days

Full certificate history on crt.sh ↗

HTTP security headers

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

findings

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

Links to (2)

facebook.com×1
instagram.com×1