What powers 
radostfx.cz?
Last seen Sep 2026 · 27 technologies across 16 categories
Analytics
Google Analytics
since Jan 2019
Blogs
WordPress
since Jan 2019
CMS
Sanity
since Jul 2025
Databases
MySQL
since Jan 2019
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
PaaS
Vercel
since Jul 2025
Performance
Priority Hints
since Aug 2022
Programming languages
Security
HSTS
since Sep 2022
Tag managers
Google Tag Manager
since Jan 2019
UI frameworks
Tailwind CSS
since Apr 2022
Web servers
Apache Traffic Server
since Sep 2020
Webmail
Google Workspace
since Aug 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 found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 72% phone
- 28% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.68 / 10 · ranked #774,894 of all domains
52 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.1 s |
| INP | 125 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Vercel
- Weight: 3.5 MB · 61 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Amazon Web Services (216.150.1.1)
- 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 2,959,260, 2 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.radostfx.cz | 18 |
| radostfx.cz | 11 |