What powers pro-k.cz?
Last seen Sep 2026 · 19 technologies across 13 categories
Analytics
CDN
Font scripts
JavaScript libraries
Maps
Miscellaneous
Operating systems
Performance
Programming languages
Security
Web 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 not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 86% phone
- 14% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.91 / 10 · ranked #3,841,427 of all domains
9 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.7 s |
| CLS | 0 |
| TTFB | 900 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 40.2 MB · 157 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- PRO-K
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on ZONER-AS (217.198.116.154)
- DNS: regzone.cz
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only, DNSSEC signed
- SSL: DigiCert, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 31,867,773
- Verified with: Microsoft 365
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
- detected Priority Hints Apr 2026
- detected reCAPTCHA Apr 2026
- dropped reCAPTCHA Dec 2025
- detected cdnjs Nov 2025
- detected Cloudflare Nov 2025
- dropped jQuery Migrate Nov 2025
- detected Nette Framework Nov 2025