What powers zdz.pl?
Last seen Jun 2026 · 24 technologies across 15 categories
Analytics
Google Ads Conversion Tracking
since Jul 2021
Google Analytics
since Jan 2019
Google Call Conversion Tracking
since Dec 2021
Authentication
Facebook Login
since Jun 2021
CDN
Google Hosted Libraries
since Feb 2022
Font scripts
Google Font API
since Jan 2019
JavaScript frameworks
JavaScript libraries
Maps
Google Maps
since Jan 2019
Miscellaneous
PWA
since Aug 2022
Programming languages
Retargeting
Google Remarketing Tag
since Jul 2021
Security
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since May 2019
Video players
YouTube
since Dec 2023
Web servers
Nginx
since Jan 2019
Widgets
Facebook
since Jan 2019
Audience
- 83% phone
- 17% desktop
Poland
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
2.87 / 10 · ranked #1,839,929 of all domains
23 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 175 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 1.4 MB · 67 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| www.kursy.lubliniec.zdz.pl | 21 |
| www.cdun.katowice.zdz.pl | 20 |
| www.kursy.andrychow.zdz.pl | 20 |
| www.kursy.bytom.zdz.pl | 20 |
| www.kursy.kety.zdz.pl | 20 |
| www.kursy.sucha.zdz.pl | 20 |
| www.kursy.zarki.zdz.pl | 20 |
| www.szkoly.zarki.zdz.pl | 20 |
| www.kursy.olkusz.zdz.pl | 18 |
| www.kursy.pszczyna.zdz.pl | 18 |
| www.szkoly.bielsko.zdz.pl | 17 |
| www.kursy.bielsko.zdz.pl | 16 |
| www.kursy.chorzow.zdz.pl | 16 |
| www.kursy.czestochowa.zdz.pl | 16 |
| www.kursy.dabrowa.zdz.pl | 16 |
| www.kursy.gliwice.zdz.pl | 16 |
| www.kursy.katowice.zdz.pl | 16 |
| www.kursy.pyskowice.zdz.pl | 16 |
| www.kursy.raciborz.zdz.pl | 16 |
| www.kursy.rybnik.zdz.pl | 16 |
| www.kursy.skoczow.zdz.pl | 16 |
| www.kursy.sosnowiec.zdz.pl | 16 |
| www.kursy.tychy.zdz.pl | 16 |
| www.kursy.zabrze.zdz.pl | 16 |