What powers 
cvrez.cz?
Last seen Oct 2026 · 20 technologies across 11 categories
Analytics
CMS
Databases
JavaScript libraries
Maps
Miscellaneous
Programming languages
Security
Tag managers
Web servers
Webmail
AI Crawlers
Doesn't name any of the 33 AI crawlers we track in its robots.txt. Catch-all rules (User-agent: *) restrict some paths for every crawler, AI or not. Checked Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 50% phone
- 50% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.27 / 10 · ranked #440,311 of all domains
70 referring domains · OpenPageRank
Search traffic
0 est. monthly organic visits (US)
3 keywords in Google's top 30
Core Web Vitals
| LCP | 0.9 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Oct 2026.
Page
- Language: Czech
- Weight: 11.8 MB · 35 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Centrum výzkumu Řež
- Founded: 2002
- Sector: research
- Country: Czech Republic
From Wikidata (CC0).
Infrastructure
- Registered Apr 2009 (17 years) via ACTIVE 24, s.r.o., renews Apr 2027
- Hosted on WEDOS WEDOS Internet, a.s. (37.157.193.128)
- DNS: cvrez.cz
- Email: cez.cz
- Email security: SPF (hard fail), DMARC quarantine, DNSSEC signed
- SSL: Let's Encrypt, ECDSA P384, expires Jan 2027
- Common Crawl link graph: rank 518,725, 7 hosts
- Verified with: Google, Microsoft 365
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 |
|---|---|
| www.cvrez.cz | 13 |
| cvrez.cz | 12 |
| otazky-fukusima.cvrez.cz | 7 |