indexo.dev

mathe-im-advent.de

.de crawl

First seen 2026-05-02 · Last seen 2026-05-15 · ok HTTP/1.1 200 4454 ms crawled 2026-05-08

DE · 3.77.9.80 · AS16509 Amazon.com, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Mathe im Advent 2025
Language
de

Open Graph

url
http://www.mathe-im-advent.de/de/
title
Mathe im Advent 2025
description
Mathe im Advent 2025 – der beliebte Wettbewerb für Kinder, Jugendliche und Schulklassen. Mit dem Online-Adventskalender entdeckst du, wo du Mathe im Leben wirklich gebrauchen kannst. Dabei wirst du mit den Mathe-Wichteln viel Spaß haben. Lehrer*innen können mit der ganzen Klasse teilnehmen.

Technology

Server
nginx
CMS
Gatsby
Analytics
  • Plausible

Third-party hosts loaded (4)

  • mia-static-files-prod-2025.s3.amazonaws.com×74
  • mia-static-files-prod-2020.s3.amazonaws.com×2
  • cdnjs.cloudflare.com×1
  • plausible.io×1

Social

Registration

Updated
2026-04-14
Name servers
  • ns-1240.awsdns-27.org.
  • ns-1696.awsdns-20.co.uk.
  • ns-530.awsdns-02.net.
  • ns-5.awsdns-00.com.

DNS records live

NS
  • ns-1240.awsdns-27.org
  • ns-1696.awsdns-20.co.uk
  • ns-5.awsdns-00.com
  • ns-530.awsdns-02.net
MX
  • 1 aspmx.l.google.com
  • 10 aspmx2.googlemail.com
  • 10 aspmx3.googlemail.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
Verified for
  • Brevo
  • Google

Email authentication partial

SPF
v=spf1 include:sendgrid.net include:spf.sendinblue.com include:_spf.google.com include:email.freshdesk.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none; rua=mailto:dmarc@mathe-im-leben.de
policy: none (monitoring only)
DKIM
Show 4 DKIM selectors
  • mail: k=rsa;p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDeMVIzrCa3T14JsNY0IRv5/2V1/v2itlviLQBwXsa7shBD6TrBkswsFUToPyMRWC9tbR/5ey0nRBH0ZVxp+lsmTxid2Y2z…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArBagBZ5vrN+mGi+NxHrtRvfSyWB5sPpsxAshbK8eXwSIVihb4pCMFhUBm2Vj9hfmb+/kumr0k5hefEiOIW…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDiTWSB1Pozh9FvKz15bkY9/Mcnu6I+G/iWnjFKedL/6nMIBbfVX8ez97uZV+iFNpENNylo+elDLu2/H62+wfS8OB…
  • smtpapi: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDPtW5iwpXVPiH5FzJ7Nrl8USzuY9zqqzjE0D1r04xDN6qwziDnmgcFNNfMewVKN2D1O+2J9N14hRprzByFwfQW76…
selectors probed

Certificate (current)

Amazon RSA 2048 M04
from 2025-10-11 to 2026-11-09
Expires in 172 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 55/100 Checked live page: https://www.mathe-im-advent.de/de/

present
  • x-frame-options
  • x-content-type-options
  • referrer-policy
  • cross-origin-opener-policy
findings
  • missing HSTS
  • missing Content Security Policy
  • missing Permissions Policy
Header values
referrer-policy
same-origin
x-frame-options
DENY
x-content-type-options
nosniff
cross-origin-opener-policy
same-origin

Links to (8)

Linked from (2)