What powers 
zeiss.ch?
Last seen Sep 2026 · 9 technologies across 7 categories
CMS
Cookie compliance
JavaScript frameworks
Miscellaneous
Programming languages
Security
Tag managers
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 Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Audience
- 55% phone
- 45% desktop
Switzerland
France
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
4.72 / 10 · ranked #301,309 of all domains
90 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.7 s |
| INP | 150 ms |
| CLS | 0.05 |
| TTFB | 2100 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Akamai
- Weight: 1.9 MB · 52 requests
- Structured data: JSON-LD, OpenGraph
Homepage as crawled by the HTTP Archive, Oct 2026.
Infrastructure
- Hosted on Akamai (23.49.251.228, IPv6)
- DNS: Akamai Edge DNS
- Email: retarus.com
- Email security: SPF (hard fail), DMARC reject
- SSL: DigiCert, RSA 4096, expires Nov 2026
- Common Crawl link graph: rank 1,268,306, 3 hosts
- Verified with: Google
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Full technology history →
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Recent changes
- dropped core-js Feb 2026
- dropped web-vitals Jan 2026
- detected web-vitals Nov 2025