What powers chabadlibrary.org?
Last seen Aug 2026 · 5 technologies across 5 categories
CDN
Cloudflare
since Jan 2023
Operating systems
Windows Server
since Aug 2018
Security
HSTS
since Sep 2022
Web frameworks
Microsoft ASP.NET
since Aug 2018
Web servers
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Sep 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
- 69% phone
- 30% desktop
United States
Israel
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.36 / 10 · ranked #1,053,782 of all domains
49 referring domains · OpenPageRank
Core Web Vitals
| LCP | 2.2 s |
| INP | 100 ms |
| CLS | 0 |
| TTFB | 1100 ms |
Real user p75, Chrome UX Report, Aug 2026.
Page
- Weight: 0.2 MB · 5 requests
Homepage as crawled by the HTTP Archive, Sep 2026.
Organisation
- Library of Agudas Chassidei Chabad
- Founded: 1827
- Country: United States
From Wikidata (CC0).
Infrastructure
- Hosted on SHARKTECH (208.98.35.233)
- DNS: chabadonline.com
- Email: chabad.org
- Email security: no SPF record, no DMARC record
- Common Crawl link graph: rank 812,250, 3 hosts
DNS records as swept Sep 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| chabadlibrary.org | 5 |
| www.chabadlibrary.org | 5 |
Full technology history →
Report an incorrect detection
Recent changes
- detected Cloudflare Jul 2026
- detected HSTS Jul 2026
- detected IIS Jul 2026
- detected Microsoft ASP.NET Jul 2026
- detected Windows Server Jul 2026