duo.at

.at crawl

First seen 2026-06-01 · Last seen 2026-06-02 · ok HTTP/1.1 200 970 ms crawled 2026-06-02

DE · 78.46.10.144 · AS24940 Hetzner Online GmbH

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title: DUO – Innovativ. Kompetent. Vielseitig.
Description: DUO steht für innovative, maßgeschneiderte Dienstleistungen in den Bereichen Reinigung, Gebäudedienste, Oberflächenschutz und Personalmanagement.
Language: de
Canonical: https://www.duo.at/

Open Graph

url: https://www.duo.at/
title: DUO Holding GmbH – Innovativ. Kompetent. Vielseitig.
locale: de_DE
site name: DUO
description: DUO steht für innovative, maßgeschneiderte Dienstleistungen in den Bereichen Reinigung, Gebäudedienste, Oberflächenschutz und Personalmanagement.

Technology

Server: Apache
CMS: WordPress
jQuery: 3.6.0

Third-party hosts loaded (3)

www.google.com×2
images.provenexpert.com×1
www.gstatic.com×1

Social

Contact

Email

Phone

Address

Aubachberg 79, 4941, Ried im Innkreis/Mehrnbach, Oberösterreich, AT

DNS records live

NS

a.ns14.net
b.ns14.net
c.ns14.net
d.ns14.net

MX

1 duo-at.mail.protection.outlook.com

TXT

Show 4 TXT records

b2k6t0im7vk64849ve973uujd9
gdubnlcncemhtd5a9td5t2miu8
qcf2qd031nofsrvun19t6bn7q2
825jqgq3cqtef1s8fjicicqhn2

Verified for

Microsoft 365

Email authentication weak

SPF: v=spf1 include:spf.protection.outlook.com include:spf.mailjet.com include:spf-de.emailsignatures365.com -all
strict (-all)
DMARC: not published
DKIM: no key found at common selectors

Certificate (current)

Encryption Everywhere DV TLS CA - G2

from 2025-11-03 to 2026-11-03

Expires in 153 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.duo.at/

findings

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