What powers 21online.com?
Last seen Jun 2026 · 27 technologies across 18 categories
Analytics
Azure Monitor
since Aug 2022
Google Analytics
since Oct 2019
Authentication
CDN
jQuery CDN
since Aug 2022
CMS
Adobe Experience Manager
since Oct 2019
Microsoft 365
since Aug 2022
Sendgrid
since Aug 2022
Font scripts
Google Font API
since Aug 2022
JavaScript frameworks
JavaScript libraries
Underscore.js
since Aug 2022
Load balancers
Amazon ALB
since Sep 2021
Miscellaneous
Babel
since Aug 2022
PaaS
Amazon Web Services
since Sep 2021
Azure
since Aug 2022
Programming languages
RUM
Microsoft Application Insights
since Aug 2022
Security
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since Oct 2019
UI frameworks
Web frameworks
Microsoft ASP.NET
since Jun 2018
Web servers
Apache HTTP Server
since Apr 2018
Nginx
since Nov 2018
Audience
- 97% desktop
- 3% phone
United States
Portugal
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.61 / 10 · ranked #5,570,373 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 5.9 s |
| INP | 50 ms |
| CLS | 0.5 |
| TTFB | 5700 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English
- Weight: 6.6 MB · 53 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| tools.21online.com | 21 |
| www.21online.com | 9 |
| classic.21online.com | 5 |
| thegoldenruler.21online.com | 3 |
Full technology history →
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Recent changes
- dropped web-vitals Mar 2026
- detected web-vitals Jan 2026