indexo.dev

jupyterbook.org

.org crawl

First seen 2026-04-11 · Last seen 2026-05-18 · ok HTTP/1.1 200 748 ms crawled 2026-05-18

US · 75.2.60.5 · AS16509 Amazon.com, Inc.

Reputation 92/100 no dmarc policy

Classifying

HTML metadata

Title
Community Guide
Language
en
Generator
mystmd

Open Graph

title
Community Guide

Technology

CDN
Netlify

Third-party hosts loaded (2)

  • cdn.jsdelivr.net×2
  • cdnjs.cloudflare.com×1

Social

Registration

Registrar
NameCheap, Inc.
Created
2019-09-24
Expires
2026-09-24 127 days left
Updated
2025-08-30
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)

E8
from 2026-04-02 to 2026-07-01
Expires in 43 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://jupyterbook.org/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=31536000

Links to (2)

Linked from (4)