What powers 
du.cz?
Last seen Aug 2026 · 21 technologies across 12 categories
Advertising
Microsoft Advertising
since Aug 2023
Analytics
Google Analytics
since Aug 2018
Microsoft Clarity
since Jul 2024
Ecommerce
Cart Functionality
since Feb 2022
JavaScript Libraries
Miscellaneous
Open Graph
since Sep 2022
RSS
since Dec 2022
Mobile Frameworks
Programming languages
Security
Tag managers
Google Tag Manager
since Jun 2019
UI frameworks
Web servers
Apache HTTP Server
since Aug 2018
Widgets
Facebook
since Dec 2018
AI Crawlers
robots.txt could not be read at the last check (Sep 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not found
- ai.txt not found
AI Crawlers
Policy unknown
Audience
- 76% desktop
- 24% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.03 / 10 · ranked #547,552 of all domains
46 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| INP | 125 ms |
| CLS | 0.1 |
| TTFB | 1000 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.0 MB · 2 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on CLOUD4COM-AS (92.62.124.161)
- Email: no MX record returned
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 4096, expires Oct 2026
- Common Crawl link graph: rank 14,139,588, 11 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.du.cz | 17 |
| www.dph.du.cz | 14 |
| m.du.cz | 11 |
| www.dun.du.cz | 9 |