What powers vltavanu229.cz?
Last seen Sep 2026 · 7 technologies across 4 categories
Analytics
Google Analytics
since May 2019
Font scripts
Google Font API
since May 2019
JavaScript libraries
Closure Library
since Oct 2023
Marked
since Jul 2026
Miscellaneous
Open Graph
since Sep 2022
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 100% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.13 / 10 · ranked #3,269,849 of all domains
12 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.9 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English (United States)
- CDN: Google
- Weight: 7.5 MB · 72 requests
- Structured data: Microdata, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Amazon Web Services (174.129.25.170)
- DNS: web4u.cz
- Email: no MX record returned
- Email security: DNSSEC signed
- SSL: Google Trust Services, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 14,416,374, 2 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- detected Marked Jul 2026
- detected Closure Library Jan 2026
- dropped Google Sites Dec 2025