What powers 4z.rs?
Last seen Aug 2026 · 23 technologies across 15 categories
Analytics
Caching
Development
Turbopack
since Jul 2026
Font scripts
Google Font API
since Jul 2026
Issue trackers
Sentry
since Jul 2026
JavaScript frameworks
JavaScript libraries
Miscellaneous
Performance
Priority Hints
since Jul 2026
Programming languages
Node.js
since Jul 2026
Security
HSTS
since Jul 2026
Tag managers
Google Tag Manager
since Jul 2026
UI frameworks
Headless UI
since Jul 2026
Radix UI
since Jul 2026
Web servers
Nginx
since Jul 2026
Widgets
Getsitecontrol
since Jul 2026
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Aug 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 100% phone
Serbia
Where the site's Chrome visitors come from, largest estimated audience first.
Core Web Vitals
| LCP | 1.7 s |
| INP | 250 ms |
| CLS | 0.1 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Serbian
- Weight: 1.7 MB · 97 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Subdomains
| Host | Techs |
|---|---|
| 4z.rs | 23 |
| www.4z.rs | 22 |