What powers 
passerinvest.cz?
Last seen Aug 2026 · 20 technologies across 13 categories
CMS
Databases
JavaScript frameworks
JavaScript libraries
Miscellaneous
Performance
Programming languages
Security
SEO
Video players
Web frameworks
Web servers
WordPress plugins
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Sep 2026.
- robots.txt found
- llms.txt found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt
Audience
- 50% phone
- 50% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.76 / 10 · ranked #735,619 of all domains
48 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.1 s |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech (Czechia)
- Weight: 5.7 MB · 69 requests
- WordPress theme: avada (child: avada-child-theme) · all themes
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- PASSERINVEST GROUP, a.s.
- Profiles: Facebook
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on Websupport (37.9.175.213, IPv6)
- DNS: Active 24
- Email: pstgrp.cz
- Email security: no SPF record, DMARC quarantine
- SSL: Let's Encrypt, RSA 4096, expires Dec 2026
- Common Crawl link graph: rank 8,869,006, 2 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| passerinvest.cz | 17 |
| old.passerinvest.cz | 6 |
| www.passerinvest.cz | 6 |
Full technology history →
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Recent changes
- detected HSTS Aug 2026
- detected HTTP/3 May 2026
- detected OpenResty May 2026
- detected YouTube May 2026
- dropped Google Analytics Apr 2026
- dropped Bootstrap Mar 2026
- dropped Lightbox Mar 2026
- dropped Modernizr Mar 2026
- dropped RSS Mar 2026
- dropped Twitter Emoji (Twemoji) Mar 2026
- detected Google Analytics Feb 2026
- dropped jQuery Migrate Dec 2025
- detected Twitter Emoji (Twemoji) Dec 2025
- detected LazySizes Nov 2025
- detected Lightbox Nov 2025
- detected Modernizr Nov 2025