What powers cast21.com?
Last seen Oct 2026 · 19 technologies across 10 categories
Analytics
CDN
Cookie compliance
Font scripts
JavaScript libraries
Miscellaneous
Page builders
Security
Webmail
Widgets
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
- 82% phone
- 18% desktop
United States
India
Canada
United Kingdom
Australia
Indonesia
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
3.30 / 10 · ranked #1,128,563 of all domains
76 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.5 s |
| INP | 50 ms |
| CLS | 0 |
| TTFB | 500 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Cloudflare
- Weight: 3.8 MB · 88 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- Cast21
- Industry: Healthcare (declares
MedicalOrganization) - Profiles: Facebook, Instagram, X, LinkedIn
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Cloudflare (198.202.211.1)
- DNS: Bluehost
- Email: Google Workspace
- Email security: SPF (soft fail), no DMARC record
- SSL: Google Trust Services, ECDSA P256, expires Nov 2026
- Common Crawl link graph: rank 7,121,450, 2 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 Bluehost Dec 2025