What powers sosruska.cz?
Last seen Oct 2026 · 11 technologies across 8 categories
CDN
cdnjs
since May 2022
Cloudflare
since May 2022
Font scripts
Google Font API
since Sep 2020
JavaScript frameworks
Prototype
since Sep 2020
JavaScript libraries
Miscellaneous
Open Graph
since Sep 2022
Tag managers
Google Tag Manager
since Apr 2023
Web servers
Apache HTTP Server
since Jan 2019
Webmail
Microsoft 365
since Aug 2022
AI Crawlers
robots.txt could not be read at the last check (Oct 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 90% phone
- 10% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.24 / 10 · ranked #3,017,184 of all domains
13 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 1.1 MB · 42 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Střední škola řemesel a služeb
From the homepage's own structured data (Oct 2026).
Infrastructure
- DNS: gransy.com
- Email: Microsoft 365
- Email security: SPF (hard fail), no DMARC record, DNSSEC signed
- Common Crawl link graph: rank 30,133,066, 2 hosts
DNS records as swept Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| sosruska.cz | 11 |
| www.sosruska.cz | 11 |