Proxy Checker
Detect a Proxy from an IP
Enter an IP to check whether it is a proxy, what type it is, and how confident the verdict is — then automate the same check through the API.
How to detect a proxy from an IP address
To detect a proxy from an IP you check whether the address is relaying traffic on behalf of someone else. That means testing for open proxy endpoints, matching against residential and datacenter proxy pools, correlating with the Tor exit list, and inspecting forwarding headers and timing. The proxy checker above runs these checks instantly and returns the proxy type and a confidence score.
What the proxy check looks at
Proxies leave several traces — the verdict weighs all of them.
Open proxy endpoints
Exposed HTTP/HTTPS and SOCKS proxy services on the IP.
Pool membership
Presence in residential or datacenter proxy provider pools.
Tor correlation
Match against the live Tor exit-node list.
Forwarding headers
Headers that reveal relayed or chained requests.
ASN context
Hosting vs. residential ownership of the range.
Type & score
A clear proxy type label plus a 0–100 confidence value.
Where this helps
Forms & checkout
Add friction when a request comes through a proxy.
Comment & review spam
Block proxied spam at the source.
Geo enforcement
Stop proxy-based circumvention of regional rules.
Security investigation
Quickly triage a suspicious IP during an incident.
Explore related detection tools
Try Our Other Tools
Frequently asked questions
Why Choose IPScanner
Trusted by thousands of businesses worldwide to provide reliable IP intelligence
Industry-Leading Accuracy
Our AI-powered detection achieves 99.8% accuracy, significantly outperforming traditional methods.
Enterprise-Grade Performance
Built for scale with high reliability and 99.99% uptime SLA for business-critical applications.
Comprehensive Coverage
We maintain the largest database of VPN services, proxies, and anonymizers with daily updates.
Simple Integration
Easy-to-use REST API for all major programming languages and frameworks.
Transparent Communication
Clear documentation and regular updates on our detection capabilities and improvements.
Expert Support
Dedicated technical support team with deep expertise in IP intelligence and cybersecurity.
