What powers 
petrasrezek.cz?
Last seen Aug 2026 · 50 technologies across 19 categories
Analytics
Google Analytics
since Mar 2021
Linkedin Insight Tag
since Mar 2025
Caching
WP Rocket
since May 2023
CDN
CMS
Databases
MySQL
since May 2023
Font scripts
JavaScript frameworks
JavaScript libraries
Maps
Google Maps
since Mar 2021
Miscellaneous
Page builders
WordPress Block Editor
since Jul 2024
Programming languages
PHP
since Dec 2021
Security
Cloudflare Bot Management
since Jun 2025
reCAPTCHA
since Nov 2022
Tag managers
Google Tag Manager
since Mar 2021
UI frameworks
Bootstrap
since Mar 2021
Tailwind CSS
since Mar 2025
Web servers
Apache HTTP Server
since Mar 2021
Nginx
since Apr 2024
Webmail
Google Workspace
since Aug 2022
Widgets
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 not checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 56% phone
- 44% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.69 / 10 · ranked #335,656 of all domains
54 referring domains · OpenPageRank
Core Web Vitals
| LCP | 3.1 s |
| INP | 75 ms |
| CLS | 0.6 |
| TTFB | 1900 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech (Czechia)
- Weight: 5.8 MB · 182 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on IGNUM-AS Czech Republic (62.109.154.163)
- DNS: webglobe.cz
- Email: Google Workspace
- Email security: SPF (soft fail), no DMARC record, MTA-STS, BIMI
- SSL: Let's Encrypt, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 7,476,334, 2 hosts
- Verified with: Google, Meta Business
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.petrasrezek.cz | 45 |
| petrasrezek.cz | 32 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Priority Hints Aug 2026
- detected WPML Nov 2025