Your Baseline
* Leaks occur when a detected resolver matches this ISP.
Live Results
Ready to Scan
Click "Start Analysis" to generate 6 unique DNS queries and trace their path through the network.
Initializing Entropy...
How This Test Works: Accuracy & Privacy
The "Fingerprint" Method
Standard tests can be fooled by browser caches. We use Unique Subdomain Tracking.
Our tool forces your browser to find a randomized, one-time address (like uuid-1.test.com).
Because this address has never existed before, your computer must ask a DNS server to find it-revealing exactly which server is handling your data.
Smart Analysis vs. Spam
Many "stress tests" spam your connection with 50+ requests, causing browser lag and false errors. Our algorithm sends a calculated burst of specific queries. This allows us to detect complex leaks (like Load-Balancing servers) instantly, without slowing down your connection.
ISP Snooping (Proxies)
Even if you change your DNS settings, some ISPs intercept your traffic on port 53 and force it through their own servers to harvest your data. We detect this "silent hijacking."
Windows & VPN Conflicts
Operating systems often try to be "fast" by using your VPN and your local WiFi simultaneously (Multi-Homed). If your ISP answers faster than the VPN, your identity leaks.
The Solution: DoH/DoT
Using Encrypted DNS (DNS-over-HTTPS) wraps your requests in encryption. This prevents your ISP from seeing or intercepting your queries, making your browsing history invisible to them.