indexo.dev

classbuild.com

.com crawl

First seen 2026-04-29 · Last seen 2026-05-19 · ok HTTP/1.1 200 543 ms crawled 2026-05-07

US · 13.33.235.119 · AS16509 Amazon.com, Inc.

Reputation 95/100 weak security headers

sector education type homepage

HTML metadata

Title
Classbuild - Plataforma de Ensino com Banco de Questões, Cronograma, Simulados e FlashCards
Description
Feito de infoprodutores para outros infoprodutores. Vídeo Aulas, questões, comunidade e gamification... tudo isso em um só lugar
Language
pt-br

Technology

CDN
Amazon CloudFront
Server
AmazonS3

Registration

Registrar
Amazon Registrar, Inc.
Created
2012-05-04
Expires
2027-05-04 348 days left
Updated
2026-03-30
Name servers
  • ns-1418.awsdns-49.org
  • ns-1591.awsdns-06.co.uk
  • ns-50.awsdns-06.com
  • ns-678.awsdns-20.net

DNS records live

NS
  • ns-1418.awsdns-49.org
  • ns-1591.awsdns-06.co.uk
  • ns-50.awsdns-06.com
  • ns-678.awsdns-20.net
Verified for
  • Meta

Email authentication no MX

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

Certificate (current)

Amazon RSA 2048 M01
from 2026-04-30 to 2026-11-14
Expires in 177 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Linked from (1)