What powers hrejsi.cz?
Last seen Aug 2026 · 15 technologies across 9 categories
CMS
JavaScript frameworks
JavaScript libraries
Performance
Programming languages
Security
UI frameworks
Web frameworks
Web servers
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.72 / 10 · ranked #754,618 of all domains
42 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 300 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech
- Weight: 5.8 MB · 45 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on QUANTCOM-AS Quantcom a.s. (88.146.116.57)
- DNS: websupport.cz
- Email: kub.cz
- Email security: SPF (soft fail), no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 618,493, 17 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| 4p.hrejsi.cz | 12 |
| scrabble.hrejsi.cz | 5 |
| hrejsi.cz | 1 |
| obchod.hrejsi.cz | 1 |
| obr.hrejsi.cz | 1 |
| testapp.hrejsi.cz | 1 |
| www.hrejsi.cz | 1 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Ruby Jul 2026
- detected Ruby on Rails Jul 2026
- detected Turbo Jul 2026
- dropped YouTube Jul 2026