What powers challenge-ei.net?
Last seen Jun 2026 · 7 technologies across 6 categories
JavaScript libraries
Operating systems
Windows Server
since Aug 2022
Programming languages
Java
since Aug 2022
Security
HSTS
since Sep 2022
Web frameworks
JavaServer Faces
since Aug 2022
Web servers
Audience
United States
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
0.58 / 10 · ranked #22,625,761 of all domains
5 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.9 s |
| INP | 150 ms |
| CLS | 0.7 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 1.0 MB · 16 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| challenge-ei.net | 7 |
| www.challenge-ei.net | 7 |