What powers prefa.cz?
Last seen Aug 2026 · 20 technologies across 12 categories
Analytics
CDN
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
Photo galleries
Programming languages
SEO
Web servers
WordPress plugins
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 59% phone
- 34% desktop
- 7% tablet
Czechia
Slovakia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.67 / 10 · ranked #778,893 of all domains
37 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.2 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech
- Weight: 3.6 MB · 113 requests
- WordPress theme: prefa2020 · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on BLINDSPOT (91.239.200.35, IPv6)
- DNS: thinline.cz
- Email: prefa.cz
- Email security: SPF (hard fail), DMARC monitor only
- SSL: Sectigo, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 12,636,882, 3 hosts
- Verified with: Google, Microsoft 365, Pinterest
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped CookieYes Dec 2025
- dropped Matomo Analytics Dec 2025
- detected Moove GDPR Consent Nov 2025