indexo.dev

schubu.org

.org crawl

First seen 2026-05-27 · Last seen 2026-05-31 · ok HTTP/1.1 200 775 ms crawled 2026-05-30

AT · 185.150.10.10 · AS61098 Akenes SA

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
SchuBu - Das interaktive Schulbuch
Description
SchuBu ist das größte, kostenfrei zugängliche Schulbuchprojekt Europas! Hier findest du optimal aufbereitete Inhalte des Lehrplans.
Language
de
Canonical
https://www.schubu.org

Open Graph

url
https://www.schubu.org
title
SchuBu - das interaktive Schulbuch
locale
de_DE
site name
SchuBu - das interaktive Schulbuch
description
SchuBu ist das größte, kostenfrei zugängliche Schulbuchprojekt Europas! Hier findest du optimal aufbereitete Inhalte des Lehrplans.

Technology

Server
nginx

Social

DNS records live

NS
  • x.ns.joker.com
  • y.ns.joker.com
  • z.ns.joker.com
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
Verified for
  • Google

Email authentication partial

SPF
v=spf1 ip4:185.150.10.10 include:_spf.google.com -all
strict (-all)
DMARC
v=DMARC1; p=none; rua=mailto:dmarc-report@schubu.org; ruf=mailto:postmaster@schubu.org; fo=1;
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

E7
from 2026-04-25 to 2026-07-24
Expires in 54 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 55/100 Checked live page: https://schubu.org/

present
  • strict-transport-security
  • x-content-type-options
findings
  • short HSTS max-age
  • 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=10886401

Links to (2)

Linked from (2)