What powers pecr.cz?
Last seen Sep 2026 · 12 technologies across 10 categories
Analytics
Google Analytics
since Jan 2019
Cookie compliance
JavaScript libraries
Live chat
WhatsApp Business Chat
since Nov 2024
Miscellaneous
PWA
since Aug 2022
Operating systems
Debian
since Feb 2020
Programming languages
PHP
since Jan 2019
Tag managers
Google Tag Manager
since Jan 2019
Web frameworks
Nette Framework
since Feb 2020
Web servers
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 not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 85% phone
- 15% desktop
Czechia
Poland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.12 / 10 · ranked #3,287,731 of all domains
9 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- Weight: 10.2 MB · 51 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on WEB4U (81.91.83.112)
- DNS: web4u.cz
- Email: no MX record returned
- Email security: SPF (soft fail), DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 17,647,084
- Verified with: Google
DNS records as swept Aug 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- detected core-js Nov 2025
- detected Facebook Pixel Nov 2025