cssmasterclass.io

.io crawl

First seen 2026-04-11 · Last seen 2026-05-18 · ok HTTP/1.1 200 1044 ms crawled 2026-05-18

US · 104.21.1.17 · AS13335 Cloudflare, Inc.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
CSS Masterclass: learn CSS with online courses, interactive examples, coding exercises, educational screencasts, and project building tutorials
Description
Master CSS and develop your Frontend skills through unique interactive online Courses, educational Screencasts, and Project building tutorials.

Open Graph

url
https://cssmasterclass.io/
title
CSS Masterclass
site name
CSS Masterclass
description
Master CSS and develop your Frontend skills through unique interactive online Courses, educational Screencasts, and Project building tutorials.

Technology

CDN
Cloudflare

DNS records live

NS
  • bayan.ns.cloudflare.com
  • iris.ns.cloudflare.com
MX
  • 10 in1-smtp.messagingengine.com
  • 20 in2-smtp.messagingengine.com
TXT
  • google-site-verification=F6YEtMQOg-AWAspRkOb_FNA_8wfkvA9lSfhv-yNZFps

Email authentication partial

SPF
v=spf1 include:spf.messagingengine.com ?all
neutral (?all)
DMARC
v=DMARC1; p=none;
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

WE1
from 2026-04-11 to 2026-07-10
Expires in 52 days

HTTP security headers

Header hygiene 75/100 Checked live page: https://cssmasterclass.io/

present
  • strict-transport-security
  • x-frame-options
  • x-content-type-options
  • referrer-policy
findings
  • missing Content Security Policy
  • missing Permissions Policy
Header values
referrer-policy
strict-origin-when-cross-origin
x-frame-options
SAMEORIGIN
x-content-type-options
nosniff
strict-transport-security
max-age=63072000; includeSubDomains

Links to (4)

Linked from (1)