indexo.dev

pressbooks.com

.com crawl

First seen 2026-04-13 · Last seen 2026-05-19 · ok HTTP/1.1 200 255 ms crawled 2026-05-06

US · 13.33.235.41 · AS16509 Amazon.com, Inc.

Reputation 97/100 dmarc monitor-only

Classifying

HTML metadata

Title
Pressbooks: The Leading Platform for Digital Publishing & OER
Description
Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER)
Language
en-CA
Generator
WordPress 6.9.4
Canonical
https://pressbooks.com/
Feeds

Open Graph

url
https://pressbooks.com/
title
Pressbooks: The Leading Platform for Digital Publishing & OER
locale
en_US
site name
Pressbooks
description
Pressbooks empowers authors, educators and organizations to create, publish and share digital books and open educational resources (OER) opti

Technology

CDN
Amazon CloudFront
Server
nginx
CMS
WordPress
Analytics
  • Google Tag Manager
Social widgets
  • YouTube Embed

Third-party hosts loaded (4)

  • www.googletagmanager.com×3
  • js.hs-scripts.com×2
  • js.hsforms.net×1
  • www.youtube.com×1

Social

Contact

Phone

Registration

Registrar
Tucows Domains Inc.
Created
2004-03-16
Expires
2027-03-16 299 days left
Updated
2026-03-15
Name servers
  • ns-1499.awsdns-59.org
  • ns-1738.awsdns-25.co.uk
  • ns-457.awsdns-57.com
  • ns-877.awsdns-45.net

DNS records live

NS
  • ns-1499.awsdns-59.org
  • ns-1738.awsdns-25.co.uk
  • ns-457.awsdns-57.com
  • ns-877.awsdns-45.net
MX
  • 10 aspmx.l.google.com
  • 20 alt1.aspmx.l.google.com
  • 30 alt2.aspmx.l.google.com
  • 40 aspmx2.googlemail.com
  • 50 aspmx3.googlemail.com
Verified for
  • Google

Email authentication strong

SPF
v=spf1 a include:_spf.google.com include:spf.mtasv.net include:mail.zendesk.com include:40117020.spf02.hubspotemail.net ~all
softfail (~all)
DMARC
v=DMARC1;p=none;
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

Amazon RSA 2048 M02
from 2025-07-19 to 2026-08-18
Expires in 89 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 55/100 Checked live page: https://pressbooks.com/

present
  • content-security-policy
  • x-content-type-options
findings
  • missing HSTS
  • CSP uses wildcard sources
  • missing frame protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-content-type-options
nosniff
content-security-policy
frame-ancestors *

Links to (4)

Linked from (2)