What powers 4zsrf.cz?
Last seen Jun 2026 · 13 technologies across 8 categories
Font scripts
Google Font API
since Jul 2019
JavaScript libraries
OWL Carousel
since Jul 2019
prettyPhoto
since Jul 2019
Miscellaneous
RSS
since Dec 2022
Photo galleries
PhotoSwipe
since Jan 2025
Programming languages
PHP
since Oct 2021
Web frameworks
Web servers
Apache HTTP Server
since Sep 2023
Nginx
since Jul 2019
Webmail
Apple iCloud Mail
since Jan 2023
Google Workspace
since Aug 2022
Audience
- 100% phone
Czechia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.46 / 10 · ranked #6,889,512 of all domains
4 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Czech
- Weight: 2.0 MB · 53 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.4zsrf.cz | 12 |
| 4zsrf.cz | 8 |