What powers 
promotion.cz?
Last seen Sep 2026 · 15 technologies across 11 categories
Analytics
Google Analytics
since Mar 2021
CDN
jsDelivr
since Jun 2024
SparkPost
since Aug 2022
JavaScript frameworks
JavaScript libraries
Miscellaneous
Operating systems
Debian
since Oct 2022
Security
HSTS
since Oct 2022
Tag managers
Google Tag Manager
since Mar 2021
Web servers
Webmail
Microsoft 365
since Aug 2022
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.52 / 10 · ranked #874,769 of all domains
36 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech
- Weight: 10.6 MB · 69 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on VSHOSTING (185.115.1.39)
- DNS: Hurricane Electric
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC quarantine
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 13,415,864, 2 hosts
- Verified with: Google, Microsoft 365, OpenAI
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| promotion.cz | 15 |
| www.promotion.cz | 14 |
Full technology history →
Report an incorrect detection
Recent changes
- detected core-js Jan 2026
- detected Facebook Pixel Jan 2026