indexo.dev

jigsaw.org

.org crawl

First seen 2026-04-15 · Last seen 2026-05-07 · ok HTTP/1.1 200 3193 ms crawled 2026-05-09

US · 104.131.200.142 · AS14061 DigitalOcean, LLC

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
The Jigsaw Classroom
Description
The jigsaw technique is a cooperative learning approach that reduces racial conflict among school children, promotes better learning, improves student motivation, and increases enjoyment of the learning experience.
Language
en

Technology

Server
nginx
Analytics
  • Google Tag Manager
Ads
  • Google AdSense

Third-party hosts loaded (5)

  • maxcdn.bootstrapcdn.com×2
  • pagead2.googlesyndication.com×2
  • ajax.googleapis.com×1
  • cdn.jsdelivr.net×1
  • www.googletagmanager.com×1

Registration

Registrar
NameCheap, Inc.
Created
1999-04-08
Expires
2027-04-08 322 days left
Updated
2026-03-14
Name servers
  • dns1.registrar-servers.com
  • dns2.registrar-servers.com

DNS records live

NS
  • dns1.registrar-servers.com
  • dns2.registrar-servers.com
MX
  • 10 eforward1.registrar-servers.com
  • 10 eforward2.registrar-servers.com
  • 10 eforward3.registrar-servers.com
  • 15 eforward4.registrar-servers.com
  • 20 eforward5.registrar-servers.com

Email authentication weak

SPF
v=spf1 include:spf.efwd.registrar-servers.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-03-10 to 2026-06-08
Expires in 18 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Links to (1)

Linked from (1)