What powers eru.cz?
Last seen Jun 2026 · 16 technologies across 11 categories
Analytics
Google Analytics
since Aug 2018
CDN
jsDelivr
since May 2022
CMS
Font scripts
Google Font API
since May 2022
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Operating systems
Ubuntu
since Mar 2021
Programming languages
Security
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since Sep 2022
Web servers
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
Audience
- 71% desktop
- 29% phone
Czechia
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
7.02 / 10 · ranked #40,660 of all domains
348 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Language: Czech
- Weight: 0.1 MB · 8 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| kalkulator.eru.cz | 15 |
| www.eru.cz | 13 |
| licence.eru.cz | 4 |