What powers arc21.org?
Last seen Jun 2026 · 23 technologies across 13 categories
CDN
CMS
Ecommerce
Cart Functionality
since Jul 2021
Font scripts
Issue trackers
Sentry
since Jan 2023
JavaScript frameworks
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Performance
Priority Hints
since Aug 2023
Programming languages
TypeScript
since Apr 2026
Security
Cloudflare Bot Management
since Nov 2021
HSTS
since Sep 2022
Translation
Weglot
since Nov 2023
Webmail
Google Workspace
since Aug 2022
Audience
- 51% desktop
- 49% phone
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.45 / 10 · ranked #2,579,769 of all domains
14 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 75 ms |
| CLS | 0.05 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: English (United States)
- Weight: 2.2 MB · 96 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
Report an incorrect detection
Recent changes
- detected Sentry May 2026
- detected Angular Apr 2026
- detected TypeScript Apr 2026
- detected Zone.js Apr 2026
- dropped Google Font API Jan 2026
- dropped Elfsight Dec 2025
- dropped React Aug 2025
- dropped styled-components Aug 2025