as4u.cz

.cz dns crawl

First seen 2026-05-12 · Last seen 2026-05-18 · ok HTTP/1.1 200 3567 ms crawled 2026-05-18

CZ · 88.86.100.195 · AS39392 SH.cz s.r.o.

Reputation 100/100

Classifying

HTML metadata

Title

as4u.cz s.r.o. - as4u.cz s.r.o.

Description

Redakční systém Public4u, obchodní systém Shop4u, informace o firmě as4u.cz

Language

Generator

Public4u

Feeds

RSS RSS

Open Graph

url: https://www.as4u.cz
title: as4u.cz s.r.o. - as4u.cz s.r.o.
site name: as4u.cz s.r.o.
description: Redakční systém Public4u, obchodní systém Shop4u, informace o firmě as4u.cz

Contact

Email

company@as4u.cz

Phone

+420485110911

Registration

Registrar

REG-MEDIA4WEB

Created

2003-01-27

Expires

2027-01-26 251 days left

Updated

2018-07-03

Name servers

ns.as4u.cz
ns.as4u.org
ns.district9.cz

DNS records live

NS

ns.as4u.cz
ns.as4u.org
ns.district9.cz

MX

10 mx2.as4u.cz
5 mx1.as4u.cz

TXT

qj6x05yhc5czc23thlqny57mfj98j4dt
google-site-verification=hsDd_k1KSpHqK4GFFdBhZUscvKCi_99CyFPVJtOhKew
12wjckir99ox039iybnfpkdttogfn5eh

Email authentication strong

SPF

v=spf1 include:_spf.as4u.org ~all

softfail (~all)

DMARC

v=DMARC1; p=quarantine; adkim=s

policy: quarantine

DKIM

mail: v=DKIM1; h=sha256; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnzRIwV90JGFTTj+d8oyc7k/X41YAaHsD4306TNumDSUWRsviVXJRiC79FmgWwScVCByg…

selectors probed

Certificate (current)

Thawte TLS RSA CA G1

from 2025-06-23 to 2026-07-21

Expires in 62 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 60/100 Checked live page: https://www.as4u.cz/

present

strict-transport-security
x-content-type-options

findings

missing Content Security Policy
missing frame protection
missing Referrer Policy
missing Permissions Policy

Header values

x-content-type-options: nosniff
strict-transport-security: max-age=31536000; includeSubdomains