What powers rostra.cz?
Last seen Aug 2026 · 35 technologies across 14 categories
CMS
Databases
Font scripts
JavaScript frameworks
JavaScript graphics
JavaScript libraries
Miscellaneous
Operating systems
Page builders
Programming languages
Security
UI frameworks
Web servers
WordPress plugins
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
1.32 / 10 · ranked #8,407,899 of all domains
3 referring domains · OpenPageRank
Core Web Vitals
| LCP | 5.3 s |
| INP | 50 ms |
| CLS | 0.05 |
| TTFB | 4000 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 16.5 MB · 95 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- ROSTRA
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on SUPERNETWORK _ (88.86.121.134)
- DNS: inext.cz
- Email: no MX record returned
- Email security: DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 38,681,649
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
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Recent changes
- dropped MailChimp Mar 2026
- dropped MailChimp for WordPress Mar 2026