What powers 4usystem.net?
Last seen Jun 2026 · 4 technologies across 3 categories
Audience
South Korea
Countries where the site has Chrome traffic, strongest markets first.
Core Web Vitals
| LCP | 2.5 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Korean
- Weight: 0.3 MB · 3 requests
Homepage as crawled by the HTTP Archive, Jul 2026.