What powers 
zzspk.cz?
Last seen Sep 2026 · 19 technologies across 12 categories
Analytics
CMS
Databases
Font scripts
JavaScript libraries
Miscellaneous
Operating systems
Programming languages
Security
UI frameworks
Web frameworks
Web servers
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 Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 82% phone
- 18% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.70 / 10 · ranked #764,576 of all domains
45 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.7 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Weight: 0.6 MB · 33 requests
- Structured data: OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Emergency Services of Pilsen
- Founded: 2006
- Country: Czech Republic
From Wikidata (CC0).
Infrastructure
- Hosted on IGNUM-AS Czech Republic (62.109.154.40, IPv6)
- DNS: onebit.cz
- Email: zzspk.cz
- Email security: SPF (soft fail), DMARC monitor only, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Nov 2026
- Common Crawl link graph: rank 15,129,268, 7 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.zzspk.cz | 9 |
| fr.zzspk.cz | 8 |
| mail.zzspk.cz | 5 |
Full technology history →
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Recent changes
- detected HTTP/3 Apr 2026