adg-business-school.de

.de crawl

First seen 2026-04-13 · Last seen 2026-05-19 · ok HTTP/1.1 200 983 ms crawled 2026-05-06

DE · 88.198.220.177 · AS24940 Hetzner Online GmbH

Reputation 97/100 dmarc monitor-only

Classifying

HTML metadata

Title: ADG Business School - Dein berufsintegriertes Studium
Description: Praxisnahe, ausbildungs- und berufsintegrierte Bachelor- und Masterstudiengänge im Bereich der Betriebswirtschaftslehre. Jetzt informieren!
Language: de
Generator: WordPress 6.9.4
Canonical: https://www.adg-business-school.de/

Open Graph

url: https://www.adg-business-school.de/
title: ADG Business School - Dein berufsintegriertes Studium
locale: de_DE
site name: ADG Business School
description: Praxisnahe, ausbildungs- und berufsintegrierte Bachelor- und Masterstudiengänge im Bereich der Betriebswirtschaftslehre. Jetzt informieren!

Technology

Server: HTTP
CMS: WordPress

Analytics

Google Tag Manager

Third-party hosts loaded (2)

cdn.jsdelivr.net×2
www.googletagmanager.com×2

Social

Contact

Email

Phone

+49260214209

Registration

Updated

2019-01-17

Name servers

ns-a.ktk.de.
ns-b.ktk.io.
ns-c.ktk.de.

DNS records live

NS

ns-a.ktk.de
ns-b.ktk.io
ns-c.ktk.de

MX

0 adgbusinessschool-de0i2b.mail.protection.outlook.com

Verified for

Google

Email authentication strong

SPF

v=spf1 +a:mail5.chamaeleon.de +a:mailnc1.chamaeleon.de +a:mail.adgonline.de include:spf.protection.outlook.com include:_spf.aranes.de -all

strict (-all)

DMARC

v=DMARC1; p=none; pct=100; rua=mailto:dmarc_report@adg-business-school.de

policy: none (monitoring only)

DKIM

selector1: v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC7r4OgeQEyy/BDtXrtsJzXFg/xz1ed2UXhhLj3jAcXYDdT1ui1JKQKKT01Cu+K1kAuuX6p9gM3MmaQHHULWc…

selectors probed

Certificate (current)

R13

from 2026-04-09 to 2026-07-08

Expires in 49 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://www.adg-business-school.de/

present

strict-transport-security
x-frame-options
x-content-type-options
referrer-policy

findings

missing Content Security Policy
missing Permissions Policy

Header values

referrer-policy: strict-origin-when-cross-origin
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
strict-transport-security: max-age=31536000; includeSubDomains