What powers 
sieber.ch?
Last seen Sep 2026 · 45 technologies across 20 categories
Analytics
CDN
CMS
Databases
Font scripts
JavaScript frameworks
JavaScript libraries
Maps
Miscellaneous
Page builders
Performance
Programming languages
Rich text editors
Security
Static site generator
Tag managers
UI frameworks
Web servers
Webmail
WordPress plugins
AI Crawlers
Doesn't mention any of the 33 AI crawlers we track in its robots.txt; all are allowed by default. Checked Oct 2026.
- robots.txt found
- llms.txt not found
- ai.txt not found
- Sep 2026 robots.txt appeared
- Sep 2026 * added to robots.txt
AI Crawlers
No AI crawlers blocked
Audience
- 65% phone
- 35% desktop
Switzerland
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.64 / 10 · ranked #795,204 of all domains
28 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.4 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 1200 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Weight: 4.1 MB · 37 requests
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on KRYSTAL (141.98.26.36)
- DNS: ip-plus.net
- Email: Microsoft 365
- Email security: no SPF record, no DMARC record
- SSL: Let's Encrypt, ECDSA P256, expires Nov 2026
- Common Crawl link graph: rank 12,841,961, 4 hosts
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| www.sieber.ch | 34 |
| seefracht.sieber.ch | 11 |
| scm.sieber.ch | 7 |
Full technology history →
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Recent changes
- dropped Litespeed Cache May 2026
- detected Google Maps Apr 2026
- detected lit-element Apr 2026
- detected lit-html Apr 2026
- detected Twitter Emoji (Twemoji) Mar 2026