Open CDN detection tool

cloudflare.com CDN Detection: Possible Cloudflare Usage

CNAME, HTTP header, and ASN signals indicate that cloudflare.com may be using Cloudflare, with 45% confidence. Review the evidence and latest check time.

Checked at: 8/26/2026, 6:40:13 PMPossible layered CDN
CloudflareOutermost
Detection confidence: 45%
Detection evidence
header: cf-ray
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Fastly
Detection confidence: 45%
Detection evidence
header: x-served-by
View provider performance review

Evidence timeline

HEADERheader: x-served-by
HEADERheader: cf-ray

Methodology and limitations

Detection results are based on cross-analysis of public DNS, HTTP response headers, and ASN signals. The current determination from public data has not been cross-validated with real probes from multiple regions; confidence indicates evidence strength, not statistical accuracy.