What powers letnany.cz?
Last seen Aug 2026 · 10 technologies across 7 categories
Analytics
Google Analytics
since Dec 2021
Font scripts
Google Font API
since Jul 2021
JavaScript frameworks
Miscellaneous
Open Graph
since Mar 2024
PWA
since Mar 2023
Operating systems
Windows Server
since Jul 2021
Security
Web servers
AI Crawlers
Blocks all crawlers by default in robots.txt (User-agent: *). Checked Sep 2026.
- robots.txt found
- llms.txt not checked
- ai.txt not checked
AI Crawlers
All crawlers blocked
Audience
- 69% phone
- 31% desktop
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.25 / 10 · ranked #442,802 of all domains
39 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1500 ms |
Real user p75, Chrome UX Report, Aug 2026.
Organisation
- Library in Letňany
- Country: Czech Republic
From Wikidata (CC0).
Infrastructure
- Hosted on OPTONET-AS (78.156.158.200)
- DNS: websupport.cz
- Email: mepnet.cz
- Email security: SPF (hard fail), no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 1,357,285, 4 hosts
- Verified with: Microsoft 365
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| letnany.cz | 8 |
| www.letnany.cz | 5 |
| knihovna.letnany.cz | 2 |
Full technology history →
Report an incorrect detection
Recent changes
- detected HSTS Jul 2026
- detected Mustache Jul 2026
- detected Open Graph Jul 2026
- detected PWA Jul 2026
- detected Vue.js Jul 2026