What powers zszb.cz?
Last seen Sep 2026 · 26 technologies across 13 categories
CDN
cdnjs
since Nov 2021
Cloudflare
since Jun 2022
Google Hosted Libraries
since Aug 2025
jsDelivr
since Aug 2025
Editors
Font scripts
Google Font API
since Aug 2025
JavaScript frameworks
AlertifyJS
since Jun 2021
JavaScript graphics
JavaScript libraries
Miscellaneous
Open Graph
since Aug 2025
Programming languages
PHP
since Mar 2020
Rich text editors
UI frameworks
Web frameworks
Web servers
Apache HTTP Server
since Mar 2020
Nginx
since Feb 2020
Webmail
Apple iCloud Mail
since Jan 2023
Google Workspace
since Aug 2022
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 checked
- ai.txt not checked
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
1.56 / 10 · ranked #5,979,705 of all domains
3 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.5 s |
| INP | 300 ms |
| CLS | 0 |
| TTFB | 700 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: Czech
- Weight: 20.2 MB · 120 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on WEDOS (46.28.107.91, IPv6)
- DNS: tele3.cz
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC quarantine, DNSSEC signed
- SSL: Let's Encrypt, RSA 4096, expires Dec 2026
- Common Crawl link graph: rank 11,971,983, 4 hosts
- Verified with: Apple Business, Google, Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.zszb.cz | 24 |
| bakalari.zszb.cz | 6 |