What powers 4sr.com?
Last seen Aug 2026 · 32 technologies across 15 categories
Analytics
Authentication
CDN
Ecommerce
Hosting panels
JavaScript libraries
Miscellaneous
Operating systems
Payment processors
Performance
Programming languages
Security
UI frameworks
Web frameworks
Web servers
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 Aug 2026.
- robots.txt found
- llms.txt found
- llms-full.txt found
- ai.txt not found
AI Crawlers
No AI crawlers blocked
Standards: llms.txt, llms-full.txt
Audience
- 62% phone
- 38% desktop
Germany
United Kingdom
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
1.24 / 10 · ranked #9,381,725 of all domains
6 referring domains · OpenPageRank
Search traffic
480 est. monthly organic visits (US)
441 keywords in Google's top 30
Core Web Vitals
| LCP | 1.2 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 600 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 6.3 MB · 318 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Sep 2026.
Subdomains
| Host | Techs |
|---|---|
| www.4sr.com | 29 |
| configurator.4sr.com | 5 |
Full technology history →
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Recent changes
- detected American Express Aug 2026
- detected Apple Pay Aug 2026
- detected cdnjs Aug 2026
- detected Cloudflare Aug 2026
- detected core-js Aug 2026
- detected decimal.js Aug 2026
- detected Google Pay Aug 2026
- detected HTTP/3 Aug 2026
- detected Klarna Checkout Aug 2026
- detected Mastercard Aug 2026
- detected PayPal Aug 2026
- detected Priority Hints Aug 2026
- detected Shop Pay Aug 2026
- detected Shopify Aug 2026
- detected Visa Aug 2026