CDN Detector
Detect which CDN is serving a website — identify Cloudflare, AWS CloudFront, Fastly, Akamai and others.
About CDN Detector
CDN (Content Delivery Network) detection identifies which CDN provider is serving a website by inspecting HTTP response headers. Each CDN provider adds distinctive headers to responses — Cloudflare adds CF-Ray, AWS CloudFront adds X-Amz-Cf-Id, Fastly adds X-Fastly-Request-ID, and Akamai adds various X-Akamai headers. Knowing which CDN a site uses is useful for competitive research, security configuration review, and understanding site architecture.
FAQ
How does CDN detection work?
CDN providers add unique HTTP headers to responses. Cloudflare adds CF-Ray (a unique request ID). AWS CloudFront adds X-Amz-Cf-Id and sets Via headers mentioning cloudfront.net. Fastly adds X-Fastly-Request-ID. The server header or Via header may also reveal the CDN. Header analysis is not 100% reliable — some CDNs can be configured to hide or rename their headers.