BEST VPN TEST

VPN Detection Test

Run a real, browser-based detection test to see what your connection exposes — public IP, ISP/ASN, WebRTC leaks, and an uncertainty-aware VPN/proxy signal estimate. No data is invented: anything this tool cannot actually detect is shown as NOT AVAILABLE or COULD NOT DETECT.

How Does VPN Detection Work?

VPN detection is not a single test. It combines several signals — each imperfect on its own — into an estimate.

  • Public IP & ASN — Your public IP is looked up against a geolocation and ASN database. The organization behind the IP is one signal used to estimate whether traffic is residential or routed through a server.
  • WebRTC IP Exposure — WebRTC can expose local and public IP addresses through ICE candidates, even when a VPN routes your normal browser traffic.
  • Timezone Comparison — Your browser reports a timezone, and your IP geolocates to a timezone. A mismatch can suggest a VPN server in another region.
  • DNS (Not Browser-Detectable) — DNS leak detection requires server-side infrastructure; a browser cannot read your DNS resolver directly, so this tool cannot perform a true DNS leak test.

Important Limitations

  • This tool uses heuristics, not a definitive VPN/proxy database. Results are an estimate and can be wrong.
  • IP geolocation and ASN data come from third-party sources and may be incomplete or outdated.
  • A datacenter/hosting organization does not prove a VPN is in use — it is one signal among several.
  • WebRTC results depend on browser support, STUN reachability, and network configuration.
  • DNS leak detection is not possible from a browser alone and is reported as COULD NOT DETECT.
  • Confidence percentages are rough heuristic estimates, not precise measurements.
  • Results reflect the network and browser at the moment of the test and can change over time.

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Affiliate Disclosure: Best VPN Test is an independent comparison site. Some links are affiliate links — if you buy through them, we may earn a commission at no extra cost to you. Scores come from our own tests; we never sell placement.