indexo.dev

class101.net

.net crawl

First seen 2026-04-12 · Last seen 2026-05-01 · ok HTTP/1.1 200 3932 ms crawled 2026-05-05

US · 13.33.235.24 · AS16509 Amazon.com, Inc.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
CLASS101+ | Learn New Hobbies or Skills Online
Description
South Korea’s #1 online class platform. 6300+ classes. Digital drawing, illustration, crafts & more.
Language
en
Canonical
https://class101.net/en
Translations
  • en
  • ja
  • ko

Open Graph

title
CLASS101+ | Learn New Hobbies or Skills Online
site name
CLASS101
description
South Korea’s #1 online class platform. 6300+ classes. Digital drawing, illustration, crafts & more.

Technology

CDN
Amazon CloudFront
CMS
Next.js

Third-party hosts loaded (2)

  • cdn.jsdelivr.net×2
  • polyfill-fastly.io×1

Registration

Registrar
Amazon Registrar, Inc.
Created
2018-03-01
Expires
2027-03-01 286 days left
Updated
2026-01-25
Name servers
  • ns-1146.awsdns-15.org
  • ns-1798.awsdns-32.co.uk
  • ns-49.awsdns-06.com
  • ns-648.awsdns-17.net

DNS records live

NS
  • ns-1146.awsdns-15.org
  • ns-1798.awsdns-32.co.uk
  • ns-49.awsdns-06.com
  • ns-648.awsdns-17.net
MX
  • 1 aspmx.l.google.com
  • 10 aspmx2.googlemail.com
  • 10 aspmx3.googlemail.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
TXT
Show 12 TXT records
  • google-site-verification=oOFqPQkujRNnBaF8gGvEEI2iHhINgjkl2MSwX_JWKVU
  • google-site-verification=vKwIOnr4PW7YEtQ9ZCQbnJ96yfqsLaquS_XyhV_HtoA
  • pinterest-site-verification=2bc7baa3b33fe48a2f81410fb1c6e44f
  • v=spf1 include:mailgun.org include:_spf.google.com include:servers.mcsv.net include:sendgrid.net include:_spf.firebasemail.com ?all
  • facebook-domain-verification=ixd75oj3ybwbww46gou43hu83f7cew
  • firebase=class101-api
  • google-site-verification=2wvog4VMvoT4XOsHg8bpIFp5DUR-CbGYECrCRSIWf6Y
  • google-site-verification=SwuXVNPtmdgX-6jVurqKkDgXusOHcAMwPGwRNkK_oF4
  • google-site-verification=YOR-pjpUz6BfbejMWsquygUH7D090Uq8JiotSABIYqo
  • google-site-verification=ZNcJuk6g5VADox_FxQiN6aDWn-cepZEIgIxGsBhAvuw
  • google-site-verification=laLbXB0XaapK17Qa_yg65pBfTFdERh0OWmzeR2BdFBE
  • google-site-verification=nhSS1fjVMP1dqazyCKB0xt_kXIdMjK_6l05YF56ptpk

Certificate (current)

Amazon RSA 2048 M01
from 2026-04-02 to 2026-10-17
Expires in 151 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://class101.net/en

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

Links to (3)

Linked from (1)