What powers veltrusy.cz?
Last seen Sep 2026 · 30 technologies across 23 categories
Advertising
Twitter Ads
since Jun 2021
Analytics
Google Analytics
since Apr 2019
Smartlook
since Sep 2026
Authentication
Facebook Login
since Jun 2021
Blogs
CDN
Cloudflare
since Mar 2025
CMS
Databases
MySQL
since Jan 2019
Issue trackers
Sentry
since Sep 2026
JavaScript frameworks
JavaScript libraries
Load balancers
Amazon ELB
since Sep 2026
Maps
Google Maps
since Dec 2022
Miscellaneous
Open Graph
since Sep 2026
Twitter Emoji (Twemoji)
since Jan 2019
Operating systems
Debian
since Jan 2019
PaaS
Amazon Web Services
since Sep 2026
Performance
Priority Hints
since Sep 2026
Programming languages
Security
Cloudflare Bot Management
since Mar 2025
HSTS
since Nov 2022
SEO
Tag managers
Google Tag Manager
since Sep 2026
UI frameworks
Tailwind CSS
since Sep 2026
Web servers
Widgets
Twitter
since Apr 2019
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 checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 63% phone
- 37% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.77 / 10 · ranked #2,054,735 of all domains
19 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.2 s |
| INP | 200 ms |
| CLS | 0 |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 19.1 MB · 298 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Veltrusy
- Country: Czech Republic
From the homepage's own structured data (Sep 2026) and Wikidata (CC0).
Infrastructure
- Hosted on Amazon Web Services (13.248.182.30)
- Email: no MX record returned
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed
- Common Crawl link graph: rank 13,814,587, 5 hosts
DNS records as swept Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| veltrusy.cz | 22 |
| www.veltrusy.cz | 13 |
| www.skola.veltrusy.cz | 7 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Vue.js Aug 2026
- detected Cloudflare May 2026
- detected Cloudflare Bot Management May 2026
- dropped Cloudflare Nov 2025
- dropped Cloudflare Bot Management Nov 2025