indexo.dev

isdedu.de

.de crawl

First seen 2026-06-01 · Last seen 2026-06-02 · ok HTTP/1.1 200 769 ms crawled 2026-06-02

DE · 51.116.154.224 · AS8075 Microsoft Corporation

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Home | International School of Dusseldorf
Description
Home - International School of Dusseldorf
Language
en
Canonical
https://www.isdedu.de

Open Graph

title
Home | International School of Dusseldorf
description
Home - International School of Dusseldorf

Technology

Server
Microsoft-IIS
CMS
Joomla
Analytics
  • Google Tag Manager

Third-party hosts loaded (5)

  • intlschoolofdusseldorf.static.amais.com×28
  • intlschoolofdusseldorf-cdn.website.amais.com×11
  • cce085f2c10c42588b41e03ff2e5001f.elf.site×1
  • cdn-cookieyes.com×1
  • www.googletagmanager.com×1

Contact

Email

Registration

Updated
2018-08-27
Name servers
  • ns1.ntdns.de.
  • ns2.ntdns.de.
  • ns3.ntdns.de.

DNS records live

NS
  • ns1.ntdns.de
  • ns2.ntdns.de
  • ns3.ntdns.de
MX
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
TXT
  • cRe9vA38ayGMmuybE9f6PFL3U28J1fyREiQnF6Xp+pA=
  • /4SNKu+z3RaG/7dYR+UI65JAl0slsq6cFQwAvDKEVOY=
Verified for
  • Adobe
  • Apple
  • GlobalSign
  • Google
  • Microsoft 365

Email authentication partial

SPF
v=spf1 a mx ip4:87.118.118.79 ip4:87.118.119.79 ip4:195.52.88.145 include:_spf.google.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none; rua=mailto:notification@isdedu.de
policy: none (monitoring only)
DKIM
  • google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1dDDHfLMyheCbsrB5FJ3JSwkeGeuyoFfwnD2VtSaL+R+tzPE9dxzwxTYeSRKixTMzX2VK0Kmf0eMls…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy/5LwnAWzsugJDntnr6X5x/yITYKJLgbi7mQoEZuW1CGBtiif9V5xURd9GcMwplnvLxYq4d53x86+G+3UL…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDVl5vDqfbtHBjMLB3O+PjdxUxm7OhDbq+GY3bG2YxK6O5fgk3DXoR+yVc5qSlo0HEqubUw3BuWnyipj+yxOg3jFE…
selectors probed

Certificate (current)

GeoTrust TLS RSA CA G1
from 2026-02-17 to 2026-08-18
Expires in 76 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://www.isdedu.de/

present
  • strict-transport-security
  • content-security-policy
  • x-content-type-options
findings
  • CSP uses wildcard sources
  • missing frame protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-content-type-options
nosniff
content-security-policy
frame-ancestors 'self' *.ubiqeducation.com *.amais.com isdedu.de www.isdedu.de intlschoolofdusseldorf.website.amais.com;Upgrade-Insecure-Requests;
strict-transport-security
max-age=32832000

Linked from (1)