Free Cloudflare detector · Instant · No signup
Cloudflare Detector
Check whether a domain is behind Cloudflare. Domain Doctor reads the tell-tale headers and nameservers and reports proxy vs DNS-only mode.
VASTROX HOSTING · EMAIL · DNS · SSL
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What this checks
Cloudflare sits in front of millions of sites as a CDN and security proxy. Knowing whether a domain is proxied by Cloudflare — or just using its DNS — explains its performance, its security posture, and why its origin IP is hidden.
Domain Doctor detects Cloudflare from response headers (server: cloudflare, cf-ray), the nameservers, and IP ranges, and tells you whether traffic is proxied (orange-cloud) or DNS-only (grey-cloud).
Common Cloudflare Detector errors
- Origin IP leaking despite Cloudflare proxy
- DNS on Cloudflare but proxy disabled (no protection)
- Mixed proxied and unproxied records
VASTROX HOSTING & CDN
Proper CDN, caching and origin protection
VASTROX sets up your CDN and locks the origin to the proxy so attackers can not bypass it.
- CDN and edge caching configured
- Origin firewall locked to the proxy
- DDoS protection in place
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Frequently asked questions
Proxied vs DNS-only — what’s the difference?
A proxied (orange-cloud) record routes traffic through Cloudflare for caching and security and hides your origin IP. A DNS-only (grey-cloud) record just resolves to your server with no proxying.
Why detect Cloudflare?
It explains a site’s CDN, security layer and hidden origin, which is useful for migrations, troubleshooting and competitive research.