react.dev 200
🔒 SSL Valid
HTTP Status A three-digit code showing if the site loaded successfully (200), redirects (301/302), or has errors (4xx/5xx).Read more →
200
SSL Expires When the SSL certificate expires. An expired certificate causes browser security warnings.Read more →
in 86d
Domain Expires When the domain registration expires. If not renewed, the domain becomes available to others.Read more →
N/A
Hosting The company and location where this website's server is physically located.Read more →
AWS
Security Score based on key HTTP security headers: HSTS, Content-Security-Policy, and X-Frame-Options.Read more →
1/3
IP Address The numerical address of the server hosting this website. Reveals location, provider, and network.Read more →
66.33.60.35
Tech Stack Technologies detected on this website: CMS, frameworks, libraries, CDN, and analytics tools. 5
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📊 Analytics
Google Analytics
Google Tag Manager
⚙️ Framework
Next.js
☁️ Hosting
Vercel
⚡ JS Framework
React
Screenshot 2026-08-20
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Captured: 2026-08-20 02:56:24 · 7.2 KB
DNS Records DNS translates domain names to IP addresses. Records control where the site, email, and services are directed.Read more →
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| A (IPv4) | 66.33.60.3576.76.21.123 |
| NS | hattie.ns.cloudflare.comjunade.ns.cloudflare.com |
| TXT | google-site-verification=a5RC7LuUuYSWBrPBwybnA2bPZSh4aYEDbYEg7O4t9l4 |
WHOIS / RDAP Public registration data: who registered the domain, when, and when it expires.Read more →
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| Registrar | N/A |
| Registered | N/A |
| Expires | N/A |
| Last Updated | N/A |
SSL Certificate Encrypts the connection between browsers and this website. Valid SSL = HTTPS works.Read more → Valid
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| Subject (CN) | react.dev |
| Issuer | Let's Encrypt |
| Valid From | 2026-08-16 |
| Valid Until | 2026-11-14 (86 days left) |
| SANs (1) | react.dev |
HTTP Headers Metadata sent by the server: reveals software, caching rules, and security configuration.Read more →
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| Status | 200 |
| Server | Vercel |
| Content-Type | text/html; charset=utf-8 |
| strict-transport-security | max-age=63072000 |
| cache-control | public, max-age=0, must-revalidate |
Security headers HTTP headers that protect visitors from attacks. HSTS forces HTTPS, CSP controls resource loading, X-Frame-Options prevents clickjacking.Read more →
Hosting Physical infrastructure: where the server is, who operates it, and what network it belongs to.Read more →
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| IP Address | 66.33.60.35 |
| Provider | AWS |
| Organization | Amazon.com, Inc. |
| ASN | AS16509 |
| Country | US |
| City | Walnut |
Security Score
F (2/7)
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Sitemap & Robots
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| robots.txt | Found Open |
| Sitemap | Not found |
Social & Meta Tags
Complete
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| Title | React |
| Description | React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations. |
| OG Title | React |
| OG Description | React is the library for web and native user interfaces. Build user interfaces out of individual pieces called components written in JavaScript. React is designed to let you seamlessly combine components written by independent people, teams, and organizations. |
| OG Image | https://react.dev/images/og-home.png |
| OG Type | website |
| Twitter Card | summary_large_image |
| Canonical URL | https://react.dev/ |
| Language | en |
Mail Security Email authentication records (SPF & DMARC) that prevent spoofing and phishing from this domain.Read more →
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| SPF | Not set |
| DMARC | Not set |