What powers openc3.com?
Last seen Oct 2026 · 21 technologies across 12 categories
Analytics
Google Analytics
since Aug 2025
Linkedin Insight Tag
since Jun 2026
Caching
Varnish
since Oct 2022
CDN
Cloudflare
since Feb 2023
Fastly
since Oct 2022
Documentation
Font scripts
Google Font API
since Oct 2022
JavaScript frameworks
React
since Nov 2023
TanStack Start
since Aug 2026
Miscellaneous
Open Graph
since Aug 2023
Webpack
since Nov 2023
PaaS
GitHub Pages
since Oct 2022
Vercel
since Jul 2026
Security
Cloudflare Bot Management
since Nov 2024
HSTS
since Sep 2023
Tag managers
Google Tag Manager
since Jan 2026
UI frameworks
Webmail
Apple iCloud Mail
since Feb 2023
Google Workspace
since Oct 2022
AI Crawlers
No robots.txt, so all AI crawlers are allowed by default. Checked Oct 2026.
- robots.txt not found
- llms.txt not found
- ai.txt not found
AI Crawlers
No robots.txt, all AI crawlers allowed
Audience
United States
Where the site's Chrome visitors come from, largest estimated audience first.
Open Page Rank
2.80 / 10 · ranked #1,969,136 of all domains
16 referring domains · OpenPageRank
Core Web Vitals
| LCP | 1.4 s |
| INP | 75 ms |
| CLS | 0 |
| TTFB | 300 ms |
Real user p75, Chrome UX Report, Sep 2026.
Page
- Language: English
- CDN: Vercel
- Weight: 3.4 MB · 44 requests
- Structured data: JSON-LD, OpenGraph, Twitter Cards
Homepage as crawled by the HTTP Archive, Oct 2026.
Organisation
- OpenC3
- Profiles: GitHub
From the homepage's own structured data (Oct 2026).
Infrastructure
- Hosted on Amazon Web Services (64.29.17.1)
- DNS: Cloudflare DNS
- Email: Google Workspace
- Email security: SPF (soft fail), DMARC monitor only
- SSL: Let's Encrypt, RSA 2048, expires Dec 2026
- Common Crawl link graph: rank 2,112,304, 5 hosts
- Verified with: Apple Business, Google, Microsoft 365
DNS records as swept Oct 2026, certificate as seen Oct 2026. How the web is hosted
Subdomains
| Host | Techs |
|---|---|
| openc3.com | 15 |
| docs.openc3.com | 10 |
Full technology history →
Report an incorrect detection
Recent changes
- dropped ActiveCampaign Aug 2026
- dropped Cloudflare Turnstile Aug 2026
- dropped core-js Aug 2026
- dropped Google Hosted Libraries Aug 2026
- dropped HTTP/3 Aug 2026
- dropped jQuery Aug 2026
- detected TanStack Start Aug 2026
- dropped Webflow Aug 2026
- dropped Webflow Ecommerce Aug 2026
- dropped YouTube Aug 2026
- detected Radix UI Jul 2026
- detected shadcn/ui Jul 2026
- detected Tailwind CSS Jul 2026
- detected Vercel Jul 2026
- detected Google Font API Feb 2026
- detected Google Hosted Libraries Feb 2026