crk.cz

.cz crawl

First seen 2026-05-21 · Last seen 2026-05-30 · ok HTTP/1.1 200 1616 ms crawled 2026-05-27

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

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title: Úvodní strana | Český Radioklub
Language: cs

Technology

Server: openresty
CMS: Drupal

Registration

Registrar

REG-WEB4U

Created

2000-12-06

Expires

2026-12-07 189 days left

Updated

2014-12-01

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 strong

SPF: v=spf1 include:_spf.web4u.cz ~all
softfail (~all)
DMARC: v=DMARC1; p=reject;
policy: reject (enforced)
DKIM: no key found at common selectors

Certificate (current)

R12

from 2026-04-11 to 2026-07-10

Expires in 39 days

Full certificate history on crt.sh ↗

HTTP security headers

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

findings

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

Links to (5)

Linked from (4)