What powers 
singlekras.cz?
Last seen Oct 2026 · 21 technologies across 12 categories
Analytics
Google Analytics
since Jan 2019
CDN
cdnjs
since Nov 2021
Cloudflare
since May 2022
Font scripts
JavaScript libraries
OWL Carousel
since Jan 2019
Maps
Google Maps
since Jan 2019
Marketing automation
MailChimp
since Feb 2021
Miscellaneous
PWA
since Aug 2022
Programming languages
PHP
since Jan 2019
Tag managers
Google Tag Manager
since Jan 2019
UI frameworks
Web frameworks
Nette Framework
since Jan 2019
Web servers
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 found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 79% phone
- 21% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.47 / 10 · ranked #928,313 of all domains
35 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 6.7 MB · 76 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on WEB4U Web4U s.r.o. (81.91.86.13, IPv6)
- DNS: web4u.cz
- Email: no MX record returned
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 9,747,933, 3 hosts
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| singlekras.cz | 21 |
| www.singlekras.cz | 21 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped Akamai Jul 2026
- dropped Akamai Bot Manager Jul 2026
- dropped Dojo Jul 2026