What powers kessler.ch?
Last seen Aug 2026 · 19 technologies across 12 categories
CDN
CMS
Cookie compliance
Font scripts
JavaScript frameworks
JavaScript libraries
Miscellaneous
Programming languages
Security
UI frameworks
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
AI Crawlers
No AI crawlers blocked
Audience
- 57% desktop
- 43% phone
Switzerland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.95 / 10 · ranked #612,182 of all domains
48 referring domains · OpenPageRank
Core Web Vitals
| LCP | 0.6 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 200 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: German
- Weight: 0.7 MB · 19 requests
- Structured data: JSON-LD, Microdata, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- KESSLER & CO AG
- Profiles: LinkedIn
From the homepage's own structured data (Sep 2026).
Infrastructure
- Hosted on NTS (212.103.80.68)
- DNS: nts.ch
- Email: kessler.ch
- Email security: SPF (hard fail), no DMARC record
- SSL: Let's Encrypt, RSA 3072, expires Dec 2026
- Common Crawl link graph: rank 12,047,321, 7 hosts
- Verified with: Atlassian, Proton, SwissSign
DNS records as swept Sep 2026, certificate as seen Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.kessler.ch | 12 |
| kessleronline.kessler.ch | 9 |
| jobs.kessler.ch | 7 |
Full technology history →
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Recent changes
- detected Proton Mail May 2026
- dropped Vue.js May 2026
- dropped Proton Mail Jan 2026