What powers up4.cz?
Last seen Sep 2026 · 20 technologies across 18 categories
Advertising
Google AdSense
since Nov 2021
Analytics
Google Analytics
since Jun 2021
Cookie compliance
Funding Choices
since Feb 2024
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Operating systems
CentOS
since Jun 2021
Performance
Priority Hints
since Sep 2026
Programming languages
PHP
since Jun 2021
Security
reCAPTCHA
since Nov 2021
Social logins
Facebook Login
since Jun 2021
Tag managers
Google Tag Manager
since Nov 2021
UI frameworks
Web frameworks
Web server extensions
Web servers
Apache HTTP Server
since Jun 2021
Widgets
Facebook
since Jun 2021
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 65% phone
- 35% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.08 / 10 · ranked #3,380,335 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| CLS | 0 |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 3.7 MB · 493 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on SECURITYNET-AS (176.102.64.7)
- DNS: wedos.com
- Email: Seznam Email
- Email security: no SPF record, DMARC quarantine, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 18,193,251, 4 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| cloud.up4.cz | 16 |
| helpdesk.up4.cz | 16 |
| brdy.up4.cz | 15 |
| brding.up4.cz | 12 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Priority Hints Sep 2026
- dropped Google Font API Aug 2026
- detected Google Font API Nov 2025