What powers 21c-learning.com?
Last seen Jun 2026 · 50 technologies across 19 categories
Advertising
Twitter Ads
since Oct 2021
Analytics
Google Analytics
since Apr 2019
Snowplow Analytics
since Oct 2021
CDN
Amazon CloudFront
since Dec 2023
cdnjs
since Nov 2021
Cloudflare
since Apr 2019
Google Hosted Libraries
since May 2022
Unpkg
since Oct 2021
CMS
CRM
Zoho
since Sep 2023
Databases
MySQL
since Apr 2019
Development
Microsoft Visual Studio
since Dec 2023
Campaign Monitor
since Oct 2021
Google Workspace
since Aug 2022
Sendgrid
since Aug 2022
Zoho Mail
since Sep 2023
Font scripts
Glyphicons
since Oct 2024
Twitter Emoji (Twemoji)
since Apr 2019
JavaScript libraries
Maps
Google Maps
since Apr 2019
Miscellaneous
PaaS
Amazon Web Services
since Aug 2022
Kinsta
since Aug 2020
Programming languages
PHP
since Apr 2019
Security
Cloudflare Bot Management
since Mar 2025
HSTS
since May 2024
UI frameworks
Web frameworks
Microsoft ASP.NET
since Dec 2023
Widgets
Twitter
since Apr 2019
WordPress plugins
Formidable Form
since May 2022
Popup Maker
since Jun 2022
Page
- Language: English (United States)
- CDN: Cloudflare
- Weight: 2.1 MB · 91 requests
- WordPress theme: twentyfirst · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.21c-learning.com | 46 |
| events.21c-learning.com | 10 |
Full technology history →
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Recent changes
- detected Twitter Emoji (Twemoji) Dec 2025
- dropped Google Font API Oct 2025