indexo.dev

visible-learning.org

.org crawl

First seen 2026-04-24 · Last seen 2026-05-15 · ok HTTP/1.1 200 13448 ms crawled 2026-05-18

DE · 85.13.140.190 · AS34788 Neue Medien Muennich GmbH

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
VISIBLE LEARNING - Information About What Works Best For Learning
Description
Information About What Works Best For Learning
Language
en-US
Generator
WordPress 6.5.8
Canonical
https://visible-learning.org/
Translations
  • de
  • en
  • fr
  • nl
  • zh
Feeds

Open Graph

url
https://visible-learning.org/
title
VISIBLE LEARNING
locale
en_US
site name
VISIBLE LEARNING
description
Find out more about John Hattie's Visible Learning meta-study

Technology

Server
Apache
CMS
WordPress
Fonts
  • Google Fonts

Third-party hosts loaded (3)

  • fonts.googleapis.com×2
  • www.google.com×2
  • gmpg.org×1

Registration

Registrar
RegistryGate GmbH
Created
2013-01-08
Expires
2027-01-08 233 days left
Updated
2026-02-22
Name servers
  • ns5.kasserver.com
  • ns6.kasserver.com

DNS records live

NS
  • ns5.kasserver.com
  • ns6.kasserver.com
MX
  • 10 w0095cf4.kasserver.com

Email authentication weak

SPF
v=spf1 a mx include:spf.kasserver.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-04-04 to 2026-07-03
Expires in 45 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://visible-learning.org/

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

Links to (3)

Linked from (1)