What powers 
tandem-org.cz?
Last seen Oct 2026 · 13 technologies across 8 categories
Analytics
CDN
JavaScript libraries
Miscellaneous
Programming languages
Web frameworks
Web servers
Webmail
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Nov 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
No AI crawlers blocked
Audience
- 65% desktop
- 35% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.10 / 10 · ranked #506,928 of all domains
57 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.3 s |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Weight: 3.2 MB · 58 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Registered Feb 2015 (11 years) via Webglobe, s.r.o., renews Feb 2027
- Hosted on IGNUM-AS Webglobe, s.r.o. (62.109.150.8, IPv6)
- DNS: savana.cz
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 2,247,708, 2 hosts
DNS records as swept Nov 2026, certificate as seen Nov 2026, registration from the registry's RDAP service. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| tandem-org.cz | 13 |
| www.tandem-org.cz | 13 |
Full technology history →
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Recent changes
- detected HTTP/3 Apr 2026
- dropped Font Awesome Dec 2025