indexo.dev

didaktik-der-mathematik.de

.de crawl

First seen 2026-05-08 · Last seen 2026-05-20 · ok HTTP/1.1 200 884 ms crawled 2026-05-15

DE · 5.9.101.238 · AS24940 Hetzner Online GmbH

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
GDM – Gesellschaft für Didaktik der Mathematik
Language
de-DE
Generator
WordPress 6.9.4
Canonical
https://didaktik-der-mathematik.de/
Translations
  • de
  • en
Feeds

Technology

Server
nginx
CMS
WordPress

Third-party hosts loaded (1)

  • calendar.google.com×1

Contact

Email
Phone

Registration

Updated
2022-07-01
Name servers
  • ns1073.ui-dns.biz.
  • ns1078.ui-dns.de.
  • ns1102.ui-dns.com.
  • ns1104.ui-dns.org.

DNS records live

NS
  • ns1073.ui-dns.biz
  • ns1078.ui-dns.de
  • ns1102.ui-dns.com
  • ns1104.ui-dns.org
MX
  • 10 mx00.ionos.de
  • 10 mx01.ionos.de

Email authentication partial

SPF
v=spf1 include:_spf.perfora.net include:_spf-eu.ionos.com include:_spf.kundenserver.de ~all
softfail (~all)
DMARC
v=DMARC1; p=none;
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-05-11 to 2026-08-09
Expires in 80 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 55/100 Checked live page: https://didaktik-der-mathematik.de/

present
  • strict-transport-security
  • referrer-policy
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Permissions Policy
Header values
referrer-policy
no-referrer-when-downgrade
strict-transport-security
max-age=31536000

Links to (2)

Linked from (2)