What powers flat4.org?
Last seen Jun 2026 · 8 technologies across 8 categories
Font scripts
Font Awesome
since Jun 2020
JavaScript libraries
Message boards
phpBB
since Jan 2019
Miscellaneous
RSS
since Dec 2022
Operating systems
AlmaLinux
since Nov 2025
Programming languages
Web server extensions
Web servers
Audience
- 76% phone
- 24% desktop
Czechia
Slovakia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.51 / 10 · ranked #6,417,140 of all domains
8 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.6 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Czech (Czechia)
- Weight: 0.4 MB · 32 requests
- Structured data: Microdata
Homepage as crawled by the HTTP Archive, Jul 2026.
Full technology history →
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Recent changes
- detected AlmaLinux Nov 2025