What powers 
koha-system.cz?
Last seen Sep 2025 · 10 technologies across 7 categories
Analytics
Cookie compliance
Osano
since Jun 2021
Font scripts
Font Awesome
since Apr 2020
JavaScript libraries
Search engines
UI frameworks
Web servers
Nginx
since Apr 2020
AI Crawlers
robots.txt could not be read at the last check (Nov 2026), so its policy is unknown.
- robots.txt not checked
- llms.txt not checked
- ai.txt not checked
AI Crawlers
Policy unknown
Audience
- 100% phone
Czechia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.50 / 10 · ranked #896,340 of all domains
37 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Infrastructure
- Hosted on SERVERZONECZ ServerZone s.r.o. (185.216.220.53, IPv6)
- DNS: forpsi.cz
- Email: mail25.cz
- Email security: SPF (hard fail), no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 4096, expires Jan 2027
- Common Crawl link graph: rank 9,268,079, 43 hosts
DNS records as swept Nov 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| neratovice-katalog.koha-system.cz | 9 |
| jablonec-katalog.koha-system.cz | 6 |
| kyjov-katalog.koha-system.cz | 5 |
| milevsko-katalog.koha-system.cz | 5 |
| trebon-katalog.koha-system.cz | 5 |
| unicov-katalog.koha-system.cz | 5 |