indexo.dev

edstem.org

.org crawl

First seen 2026-04-14 · Last seen 2026-05-13 · ok HTTP/1.1 200 642 ms crawled 2026-05-08

US · 104.18.3.201 · AS13335 Cloudflare, Inc.

Reputation 100/100

Classifying

HTML metadata

Title
Ed Discussion
Description
Ed Discussion helps scale course communication in a beautiful and intuitive interface. Questions reach and benefit all students in the class. Less email, more time saved.
Language
en

Technology

CDN
Cloudflare

Third-party hosts loaded (1)

  • edcdn.net×11

Registration

Registrar
Cloudflare, Inc.
Created
2017-07-24
Expires
2026-07-24 66 days left
Updated
2025-06-29
Name servers
  • elle.ns.cloudflare.com
  • ray.ns.cloudflare.com

DNS records live

NS
  • elle.ns.cloudflare.com
  • ray.ns.cloudflare.com
MX
  • 10 edstem-org.mail.protection.outlook.com
TXT
  • google-site-verification=Gjzpt1cv8phfBej7mHim2QR-LusfRx_1eQPWjdjzABw
  • MS=ms23982352

Email authentication strong

SPF
v=spf1 ip4:69.169.239.74 ip4:54.240.84.232 ip4:54.240.84.231 include:amazonses.com include:spf.protection.outlook.com -all
strict (-all)
DMARC
v=DMARC1;p=reject;pct=0;rua=mailto:dmarc@edstem.org
policy: reject (enforced) · pct=0
DKIM
  • selector1: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAs9HszylI8o7v7tmaqq/Mb4DtxRI3DsmPjfMokudrP+pYDNACPgZYsL1/I/+ecA/uv1zzHPYN4LE+QN…
  • selector2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvxYRAEMeAbD81fIYO/5XMUYkSaAAx2TZ/NtL/BLFdj45KPHthL1FNAgjiNw3bmk61D+07gXwaqDFl4…
selectors probed

Certificate (current)

E8
from 2026-05-05 to 2026-08-03
Expires in 76 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://edstem.org/

present
  • strict-transport-security
  • content-security-policy
  • x-content-type-options
  • referrer-policy
findings
  • CSP allows unsafe inline scripts/styles
  • CSP uses wildcard sources
  • missing frame protection
  • missing Permissions Policy
Header values
referrer-policy
same-origin
x-content-type-options
nosniff
content-security-policy
default-src * data: blob: 'unsafe-inline' 'unsafe-eval'; script-src * data: blob: 'unsafe-inline' 'unsafe-eval'; connect-src * data: blob: 'unsafe-inline'; img-src * data: blob: 'unsafe-inline'; frame-src * data: blob: ; style-src * data: blob: 'unsafe-inline'; font-src * data: blob: 'unsafe-inline'; frame-ancestors * data: blob:; object-src * data: blob: 'unsafe-inline'
strict-transport-security
max-age=31536000; includeSubDomains; preload

Linked from (5)