What powers 
kacr.cz?
Last seen Aug 2026 · 22 technologies across 13 categories
Analytics
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
Operating systems
Performance
Programming languages
Security
Web 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
- 78% desktop
- 22% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.94 / 10 · ranked #252,897 of all domains
75 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.5 s |
| INP | 25 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech
- Weight: 0.7 MB · 35 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on ZONER-AS (217.198.119.177)
- DNS: regzone.cz
- Email: kacr.cz
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed
- SSL: DigiCert, RSA 2048, wildcard, expires Mar 2027
- Common Crawl link graph: rank 7,710,668, 6 hosts
- Verified with: Google, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| auditor.kacr.cz | 15 |
| www.kacr.cz | 7 |
| sb.kacr.cz | 5 |
Full technology history →
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Recent changes
- detected HSTS Apr 2026
- detected Twitter Emoji (Twemoji) Dec 2025