What powers 
lch.ch?
Last seen Aug 2026 · 12 technologies across 10 categories
Analytics
CDN
CMS
JavaScript libraries
Miscellaneous
Programming languages
Security
Tag managers
Web servers
Webmail
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
Top search keywords
| Keyword | Position | Est. monthly visits |
|---|---|---|
| hausaufgaben | #85 | 1 |
| karte von schweiz mit kantonen | #27 | 0 |
The site's top keywords in Google (US), with the visits each one is estimated to bring per month.
Top backlinks
Top links pointing at the site, one per source domain, strongest first. The anchor text opens the page carrying the link.
AI Crawlers
No AI crawlers blocked
Audience
- 52% phone
- 48% desktop
Switzerland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
6.08 / 10 · ranked #104,709 of all domains
196 referring domains · OpenPageRank
Search traffic
1 est. monthly organic visits (US)
2 keywords in Google's top 30
Core Web Vitals
| LCP | 1 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: German (Germany)
- Weight: 1.4 MB · 49 requests
- Structured data: Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Dachverband Schweizer Lehrerinnen und Lehrer
- Country: Switzerland
From Wikidata (CC0).
Infrastructure
- Hosted on OPSONE (185.17.71.16, IPv6)
- DNS: sui-inter.net
- Email: Microsoft 365
- Email security: SPF (hard fail), DMARC monitor only, CAA
- SSL: Let's Encrypt, RSA 2048, expires Oct 2026
- Common Crawl link graph: rank 502,882, 4 hosts
- Verified with: Google, Microsoft 365, SwissSign
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped jQuery UI Apr 2026
- dropped PhotoSwipe Apr 2026
- dropped PWA Apr 2026
- dropped reCAPTCHA Apr 2026
- detected OWL Carousel Mar 2026