What powers vyfuk.org?
Last seen Oct 2026 · 14 technologies across 9 categories
Analytics
Google Analytics
since Feb 2023
CDN
Font scripts
Google Font API
since Jun 2025
JavaScript graphics
Miscellaneous
Open Graph
since Feb 2023
Programming languages
PHP
since Feb 2023
Security
HSTS
since Jun 2025
Web frameworks
Nette Framework
since Jun 2025
Web servers
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
- 63% phone
- 37% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.59 / 10 · ranked #5,755,121 of all domains
9 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 2.1 MB · 28 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on CESNET2 (195.113.17.221, IPv6)
- DNS: cuni.cz
- Email: Google Workspace
- Email security: SPF (neutral), DMARC monitor only, CAA
- SSL: Let's Encrypt, ECDSA P384, expires Dec 2026
- Common Crawl link graph: rank 11,194,533, 2 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted