What powers zsrudna.cz?
Last seen Jun 2026 · 30 technologies across 16 categories
CDN
Cloudflare
since Jan 2023
CMS
WordPress
since Oct 2021
Databases
MySQL
since Oct 2021
Font scripts
Google Font API
since Jan 2019
Twitter Emoji (Twemoji)
since Feb 2026
JavaScript libraries
Miscellaneous
Operating systems
Windows Server
since Jan 2019
Page builders
Programming languages
PHP
since Jan 2019
UI frameworks
Bootstrap
since Jan 2019
Web frameworks
Microsoft ASP.NET
since Jan 2019
Web servers
Webmail
Microsoft 365
since Aug 2022
Widgets
Wheelio
since Oct 2021
WordPress plugins
WordPress themes
Audience
- 82% phone
- 18% desktop
Czechia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.61 / 10 · ranked #5,613,082 of all domains
5 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 1400 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Czech
- Weight: 1.1 MB · 75 requests
- WordPress theme: hello-elementor (child: zsrudna) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| zsrudna.cz | 18 |
| zus.zsrudna.cz | 17 |
| www.zsrudna.cz | 15 |
| skola.zsrudna.cz | 6 |
Full technology history →
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Recent changes
- dropped WP Fastest Cache Mar 2026
- detected Hello Elementor Feb 2026
- detected Twitter Emoji (Twemoji) Feb 2026