indexo.dev

bigmathematicalideas.org

.org crawl

First seen 2026-05-06 · Last seen 2026-05-06 · ok HTTP/1.1 200 7668 ms crawled 2026-05-13

US · 216.230.231.226 · AS40156 The Optimal Link Corporation

Reputation 87/100 weak security headers no dmarc policy

sector education type homepage

HTML metadata

Title
Introduction – Teaching the Big Ideas in School Mathematics
Language
en
Generator
quarto-1.6.39

Technology

Server
Apache
Fonts
  • Google Fonts

Third-party hosts loaded (5)

  • cdn.jsdelivr.net×1
  • cdnjs.cloudflare.com×1
  • fonts.googleapis.com×1
  • fonts.gstatic.com×1
  • gc.zgo.at×1

Registration

Registrar
Ascio Technologies, Inc. Danmark - Filial af Ascio technologies, Inc. USA
Created
2026-04-03
Expires
2028-04-03 683 days left
Updated
2026-04-08
Name servers
  • ns1.meganameservers.eu
  • ns2.meganameservers.eu
  • ns3.meganameservers.eu

DNS records live

NS
  • ns1.meganameservers.eu
  • ns2.meganameservers.eu
  • ns3.meganameservers.eu
MX
  • 10 mx1c51.megamailservers.eu
  • 100 mx2c51.megamailservers.eu
  • 110 mx3c51.megamailservers.eu
  • 120 mx4c51.megamailservers.eu

Email authentication weak

SPF
v=spf1 include:spfc51.megamailservers.eu ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-05-03 to 2026-08-01
Expires in 73 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://bigmathematicalideas.org/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (5)

Linked from (1)