What powers 
a-b-z.ch?
Last seen Oct 2026 · 9 technologies across 6 categories
JavaScript libraries
Miscellaneous
Programming languages
Security
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 Nov 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 57% phone
- 43% desktop
Switzerland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.51 / 10 · ranked #884,818 of all domains
24 referring domains · OpenPageRank
Search traffic
7 est. monthly organic visits (US)
7 keywords in Google's top 30
Core Web Vitals
| LCP | 0.9 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 400 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: German
- Weight: 3.0 MB · 41 requests
- Structured data: OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Allgemeine Berufsschule Zürich
- Founded: 1972
- Country: Switzerland
From Wikidata (CC0).
Infrastructure
- Hosted on ASN-METANET METANET AG (80.74.130.164)
- DNS: cyon.ch
- Email: Microsoft 365
- Email security: SPF (soft fail), no DMARC record, DNSSEC signed
- SSL: Let's Encrypt, RSA 2048, expires Jan 2027
- Common Crawl link graph: rank 12,631,398
- Verified with: Google, Microsoft 365, SwissSign
DNS records as swept Nov 2026, certificate as seen Nov 2026. How the web is hosted