Free Tool

IP Lookup & Fraud Detection

Q: Can I use this for my application?

Yes. Sign up for a free API key at sntlhq.com/signup. The free tier includes 10,000 requests per month. The API returns the same signals shown here — risk score, VPN/proxy/Tor/datacenter/residential proxy flags — plus additional enrichment data including ASN, ISP, and device signals.

Instantly check any IP address for VPNs, proxies, Tor exit nodes, datacenter hosting, and residential proxy networks. Powered by Sentinel's real-time detection engine.

[ scanning... ]

Analyzing your connection

Your IP·Network origin·Proxy signals·Device integrity

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Risk

Analyzing

VPN Detected

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Proxy Detected

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Tor Exit Node

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Datacenter IP

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Residential Proxy

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Headless Browser

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Latency: —ms

How It Works

Detection in under 40ms

Real-time detection

Your IP is checked against 400+ signals in under 40ms — VPN databases, ASN reputation, datacenter ranges, residential proxy networks, and Tor exit node lists.

No personal data stored

We check network characteristics, not personal information. No browsing history, no cookies, no personally identifiable data is collected or retained.

Powered by Sentinel API

This tool runs on the same detection engine available for your application. Integrate the same intelligence into your signup flow, checkout, or login with a single API call.

FAQ

Common questions

What does this tool check?

This tool checks your IP address against VPN and proxy databases, ASN reputation data, datacenter IP ranges, residential proxy network signatures, and Tor exit node lists. It also evaluates browser and device signals for additional fraud indicators.

Is it free?

Yes, completely free. No account needed, no credit card required. For bulk or programmatic access to the same data, sign up for an API key at /signup — the free tier includes 10,000 requests per month.

How accurate is it?

Sentinel checks 400+ signals per request with under 40ms latency. Accuracy exceeds 99% for datacenter and VPN IPs, and exceeds 95% for residential proxies — which are the hardest category to detect reliably.

Can I use this for my application?

Yes. Sign up for a free API key at /signup. The free tier includes 10,000 requests per month. The API returns the same signals shown here — risk score, VPN/proxy/Tor/datacenter/residential proxy flags — plus additional enrichment data including ASN, ISP, and device signals.

Can I look up a specific IP address?

Currently this tool analyzes your own connection. For bulk IP lookup or looking up arbitrary IPs programmatically, use the Sentinel API. Sign up at /signup to get started.

Add this to your platform

10,000 free API requests per month. No credit card. Live in minutes.

[ Get Free API Key ]