What powers a4.school?
Last seen Jun 2026 · 13 technologies across 7 categories
JavaScript frameworks
JavaScript graphics
Chart.js
since Jun 2019
JavaScript libraries
Operating systems
Windows Server
since Jan 2019
UI frameworks
Web frameworks
Microsoft ASP.NET
since Jan 2019
Web servers
Audience
- 91% phone
- 5% desktop
- 4% tablet
Germany
Switzerland
Countries where the site has Chrome traffic, strongest markets first.
Open Page Rank
1.55 / 10 · ranked #6,076,706 of all domains
7 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.8 s |
| INP | 100 ms |
| CLS | 0.15 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Jun 2026.
Page
- Weight: 6.8 MB · 35 requests
Homepage as crawled by the HTTP Archive, Jul 2026.
Subdomains
| Host | Techs |
|---|---|
| domschulen-magdeburg.a4.school | 13 |
| ibfl.a4.school | 13 |
| lehmbaugruppe.a4.school | 13 |
| modeco.a4.school | 13 |
| rahn.a4.school | 13 |
| semper.a4.school | 13 |
| sis-en.a4.school | 13 |
| sis.a4.school | 13 |
| stiftungsschulen.a4.school | 13 |
| wbs.a4.school | 13 |
| marta-belstler-schulen.a4.school | 11 |