CNAME chain
Resolve the final hostname and match known edge-domain evidence.
CDN Checker
CDN Checker
Identify CDN providers from CNAME and response-header evidence without unsupported guesses.
Enter a website URL to start
Edge networks and proxy caching
What is a CDN check?
A CDN proxies and caches content across distributed edge nodes to reduce network distance and can add security, compression and protocol features.
CDNs can hide origins and remove identifying headers. An unconfirmed result does not prove that no CDN exists; it means public evidence was insufficient.
Detection scope
Provider headers
Check high-confidence signals such as CF-Ray, X-Amz-Cf and X-Vercel-Id.
Generic proxy signals
Show Via, Age and X-Cache without guessing a provider from them alone.
Why inspect CDN evidence?
Knowing the real delivery layer helps diagnose cache misses, exposed origins, routing differences and conflicting proxy policies.
Confirm the traffic edge
Check whether DNS and headers point to the expected edge service.
Review cache signals
See Age, X-Cache and provider cache-state evidence.
Avoid false attribution
Do not force a provider conclusion without strong evidence.
How does the CDN checker work?
The tool reads public DNS and one page response. It does not call an external identification API or store history.
- 01
Resolve the final host
Follow safe redirects and identify the final public URL and IP.
- 02
Query CNAME
Resolve up to five CNAME levels for known edge domains.
- 03
Match provider headers
Use provider-specific headers and Server markers.
- 04
State evidence limits
Separate confirmed providers, generic proxy evidence and unconfirmed results.
CDN checker FAQ
Why is my CDN not detected?
CNAME flattening, custom hostnames, hidden headers and layered proxies can remove provider fingerprints.
Does X-Cache identify the provider?
No. It is generic and must be combined with provider-specific headers or CNAME evidence.
Does a CDN always make a site faster?
No. Coverage, cache hit ratio, origin distance, protocols and configuration all matter.
Does this expose the origin?
No origin enumeration is performed; only current public resolution and the final connection IP are shown.
Related web technology tools
After confirming the CDN, check caching, compression and modern protocols.