What powers 
esn.ch?
Last seen Aug 2026 · 12 technologies across 11 categories
Analytics
CMS
Font scripts
Hosting
JavaScript libraries
Miscellaneous
Payment processors
Programming languages
Video players
Web servers
Widgets
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 Sep 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 60% desktop
- 40% phone
Switzerland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.16 / 10 · ranked #475,404 of all domains
44 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.8 s |
| INP | 25 ms |
| CLS | 0.05 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- Weight: 2.7 MB · 67 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Infrastructure
- Hosted on Cloudflare (104.21.50.38, IPv6)
- Email: no MX record returned
- SSL: Let's Encrypt, ECDSA P256, expires Oct 2026
- Common Crawl link graph: rank 7,011,701, 21 hosts
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| winterthur.esn.ch | 9 |
| epfl.esn.ch | 8 |
| esn.ch | 8 |
| unil.esn.ch | 8 |
| bern.esn.ch | 7 |
| fhnw.esn.ch | 7 |
| luzern.esn.ch | 7 |
| zurich.esn.ch | 5 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Google Font API Dec 2025
- dropped Java Dec 2025