What powers redbuttonedu.cz?
Last seen Oct 2026 · 27 technologies across 15 categories
Analytics
CDN
CMS
Databases
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
Security
Tag managers
Video players
Web frameworks
Web servers
Webmail
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 * added to robots.txt
AI Crawlers
No AI crawlers blocked
Audience
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.40 / 10 · ranked #1,009,648 of all domains
36 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 1.7 MB · 27 requests
- WordPress theme: eduteka · all themes
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on VSHOSTING (185.59.208.137)
- DNS: websupport.cz
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 7,483,585, 4 hosts
- Verified with: Atlassian, Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.redbuttonedu.cz | 19 |
| edu.redbuttonedu.cz | 12 |
Full technology history →
Report an incorrect detection
Recent changes
- detected cdnjs Aug 2026
- detected Nette Framework Aug 2026
- dropped Backbone.js Jun 2026
- dropped Bootstrap Jun 2026
- dropped cdnjs Jun 2026
- dropped Clipboard.js Jun 2026
- dropped Font Awesome Jun 2026
- dropped jQuery Jun 2026
- dropped jQuery Migrate Jun 2026
- dropped jQuery UI Jun 2026
- dropped MediaElement.js Jun 2026
- dropped Priority Hints Jun 2026
- dropped RSS Jun 2026
- dropped Slick Jun 2026
- dropped Underscore.js Jun 2026
- dropped YouTube Jun 2026
- detected Alpine.js May 2026
- dropped ElasticPress May 2026
- dropped Elasticsearch May 2026
- detected jsDelivr May 2026
- detected Unpkg May 2026
- detected Twitter Emoji (Twemoji) Feb 2026