What powers 
pcr.cz?
Last seen Oct 2026 · 8 technologies across 7 categories
JavaScript libraries
Preact
since Nov 2023
Operating systems
Windows Server
since May 2021
Reverse proxies
F5 BigIP
since Nov 2023
Security
HSTS
since Nov 2022
Web frameworks
Microsoft ASP.NET
since May 2021
Web servers
Webmail
Apple iCloud Mail
since Nov 2023
Microsoft 365
since Apr 2026
AI Crawlers
Blocks all crawlers by default in robots.txt (User-agent: *). Checked Nov 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
All crawlers blocked
Audience
- 95% desktop
- 5% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.18 / 10 · ranked #462,432 of all domains
23 referring domains · OpenPageRank
Core Web Vitals
| LCP | 5.2 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 5000 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Weight: 0.1 MB · 3 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Registered Nov 2004 (21 years) via ZONER a. s. (CZECHIA.COM), renews Nov 2026
- Hosted on GOVCZ MINISTERSTVO VNITRA CR (94.199.45.29)
- DNS: regzone.cz
- Email: no MX record returned, SPF names Microsoft 365
- Email security: SPF (hard fail), DNSSEC signed
- SSL: Sectigo, RSA 4096, wildcard, expires Mar 2027
- Common Crawl link graph: rank 11,098,208, 13 hosts
- Verified with: Apple Business, Cisco, 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 |
|---|---|
| meet.pcr.cz | 5 |
| ubyport.pcr.cz | 5 |
| ubytovani.pcr.cz | 3 |
| mail.pcr.cz | 2 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Microsoft 365 Apr 2026