What powers u3r.cz?
Last seen Sep 2026 · 20 technologies across 13 categories
Analytics
Google Analytics
since Jan 2019
CDN
CMS
WordPress
since Jan 2019
Databases
MySQL
since Jan 2019
Font scripts
Font Awesome
since Jun 2026
Google Font API
since Jun 2026
JavaScript libraries
Miscellaneous
HTTP/3
since Jun 2026
Open Graph
since Jun 2026
Page builders
WordPress Block Editor
since Jun 2026
Performance
Priority Hints
since Jun 2026
Programming languages
PHP
since Jan 2019
Tag managers
Google Tag Manager
since Mar 2019
WordPress plugins
Smash Balloon Instagram Feed
since Jun 2026
WordPress themes
AI Crawlers
robots.txt could not be read at the last check (Oct 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 83% phone
- 17% desktop
Czechia
Italy
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.08 / 10 · ranked #1,461,865 of all domains
31 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.7 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 2000 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 3.4 MB · 71 requests
- WordPress theme: astra (child: astra-child) · all themes
- Structured data: JSON-LD, Microdata, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
From the homepage's own structured data (Oct 2026) and Wikidata (CC0).
Infrastructure
- Hosted on INTERNET-CZ Ktis 2, 384 03 Ktis (185.129.138.220)
- DNS: forpsi.cz
- Email: forpsi.com
- Email security: no SPF record, no DMARC record
- Common Crawl link graph: rank 3,420,231, 2 hosts
DNS records as swept Oct 2026. How the web is hosted
Full technology history →
Report an incorrect detection
Recent changes
- dropped Apache HTTP Server Jul 2026
- dropped Cookie Script Jul 2026
- dropped FancyBox Jul 2026
- dropped Google Maps Jul 2026
- dropped jQuery CDN Jul 2026
- detected AOS Jun 2026
- detected Astra Jun 2026
- detected Font Awesome Jun 2026
- detected Google Font API Jun 2026
- detected HTTP/3 Jun 2026
- detected jQuery Migrate Jun 2026
- detected jsDelivr Jun 2026
- detected MySQL Jun 2026
- detected Open Graph Jun 2026
- detected PHP Jun 2026
- detected Priority Hints Jun 2026
- detected Smash Balloon Instagram Feed Jun 2026
- detected Spectra Jun 2026
- detected Unpkg Jun 2026
- detected WordPress Jun 2026
- detected WordPress Block Editor Jun 2026
- detected Yoast SEO Jun 2026