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teachingtextbooksapp.com

.com crawl

First seen 2026-05-31 · Last seen 2026-05-31 · ok HTTP/1.1 200 561 ms crawled 2026-06-01

US · 98.91.4.225 · AS14618 Amazon.com, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
Teaching Textbooks 4.0 App Server | teachingtextbooksapp.com
Description
Backend service to version 4.0 Teaching Textbooks Math apps
Language
en-us

Open Graph

title
Teaching Textbooks 4.0 App Server
site name
Teaching Textbooks 4.0 App Server
description
Provides backend API service to version 4.0 Teaching Textbooks Math apps

Technology

Server
Microsoft-IIS

Registration

Registrar
Amazon Registrar, Inc.
Created
2018-12-27
Expires
2026-12-27 207 days left
Updated
2025-11-22
Name servers
  • ns-1461.awsdns-54.org
  • ns-1796.awsdns-32.co.uk
  • ns-409.awsdns-51.com
  • ns-987.awsdns-59.net

DNS records live

NS
  • ns-1461.awsdns-54.org
  • ns-1796.awsdns-32.co.uk
  • ns-409.awsdns-51.com
  • ns-987.awsdns-59.net

Email authentication no MX

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

Amazon RSA 2048 M04
from 2026-05-04 to 2026-11-18
Expires in 168 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://teachingtextbooksapp.com/

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)