What powers stemmark.cz?
Last seen Aug 2026 · 38 technologies across 22 categories
Analytics
Authentication
Caching
CDN
CMS
Databases
Font Scripts
Issue trackers
JavaScript Frameworks
JavaScript libraries
Live chat
LMS
Miscellaneous
Operating systems
Programming languages
Security
Tag managers
UI frameworks
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 not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 64% phone
- 36% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.73 / 10 · ranked #294,282 of all domains
142 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: Czech (Czechia)
- Weight: 2.0 MB · 35 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on O2-CZECH-REPUBLIC (90.182.204.188)
- DNS: ignum.com
- Email: no MX record returned
- Email security: DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 692,649, 9 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| stemmark.cz | 19 |
| www.stemmark.cz | 19 |
| internet4.stemmark.cz | 17 |
| meet.stemmark.cz | 13 |
| tazatel.stemmark.cz | 13 |
| vzdelavani.stemmark.cz | 13 |
| dialog.stemmark.cz | 9 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Facebook Pixel May 2026
- dropped Font Awesome May 2026