What powers vzdy.cz?
Last seen Sep 2026 · 13 technologies across 12 categories
Advertising
Google AdSense
since Sep 2023
Analytics
Google Analytics
since Jan 2019
CDN
jQuery CDN
since Feb 2022
Cookie compliance
Cookie Script
since Mar 2026
Font scripts
Google Font API
since Jan 2019
JavaScript frameworks
React
since Jan 2022
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Video players
YouTube
since Jan 2022
Web servers
Webmail
Microsoft 365
since Aug 2022
Widgets
Spotify Widgets
since Feb 2022
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 100% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.56 / 10 · ranked #2,389,800 of all domains
11 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3.3 s |
| CLS | 0 |
| TTFB | 1000 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Google
- Weight: 2.0 MB · 108 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Google Cloud (35.246.223.255)
- DNS: websupport.cz
- Email: Microsoft 365
- Email security: SPF (hard fail), no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 18,307,286, 2 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- dropped core-js Apr 2026
- dropped Facebook Pixel Apr 2026
- dropped Funding Choices Apr 2026
- dropped Google Tag Manager Apr 2026
- dropped Hotjar Apr 2026
- dropped reCAPTCHA Apr 2026
- detected Cookie Script Mar 2026
- detected Google Tag Manager Feb 2026
- dropped Google Tag Manager Jan 2026