What powers ui42.cz?
Last seen Aug 2026 · 25 technologies across 15 categories
Advertising
Analytics
CDN
Cookie compliance
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
Operating systems
Performance
Security
Tag managers
UI frameworks
Web servers
Webmail
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 found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 55% phone
- 45% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.09 / 10 · ranked #3,358,909 of all domains
8 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.6 s |
| INP | 100 ms |
| CLS | 0 |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech
- Weight: 7.9 MB · 87 requests
- 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 Hetzner (95.217.226.92)
- DNS: ui42.sk
- Email: Google Workspace
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 17,131,893
- Verified with: Google
DNS records as swept Aug 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- detected Google Workspace Jun 2026
- detected Microsoft Clarity Apr 2026
- detected Google Font API Dec 2025
- dropped YouTube Dec 2025
- detected Priority Hints Nov 2025
- detected reCAPTCHA Oct 2025