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# CDN checker

Combines a domain's CNAME chain over DNS over HTTPS with response header evidence fetched through the proxy to name the serving CDN, each finding labeled with its source and a confidence level.

Press the button to detect the CDN
Nothing leaves this page until you do. The verdict combines the domain's CNAME chain with response headers, and every finding is labeled with its source and a confidence level.

Detection reads a bundled signature table covering the common providers ( 8 CDNs, plus hosting platforms and WAF layers); a provider outside the table reports as no evidence rather than a guess. Header evidence is spoofable by the origin, so server-header matches rate medium and generic cache headers rate low; provider-exclusive IDs rate high. A WAF hit names a security layer in front, not the CDN behind it. No evidence and unreadable evidence are reported as different outcomes.
Options

## More network tools

- [Live DNS lookup](/network/dns)
- [HTTP timing probe](/network/http-timing)
[All network tools](/network)

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Canonical HTML: https://nutter.tools/network/cdn-checker
Markdown version: https://nutter.tools/network/cdn-checker.md
Plain-text version: https://nutter.tools/network/cdn-checker.txt
Agent index: https://nutter.tools/llms.txt