DNS Leak Test

Even with a VPN on, your OS or browser can still send DNS lookups straight to your local ISP's DNS server instead of through the VPN tunnel. That means your ISP can still see which sites you visit — that's a DNS leak.

Many similar tools actually just look up your exit IP and label it a "DNS server". This tool runs a real authoritative DNS server that captures the actual resolver IP via unique per-test subdomains — the data is genuine, not inferred.

You can manually set your VPN provider's DNS on your OS or router, or use a VPN client that properly takes over all DNS traffic. With TonBoVPN's Global Proxy on, DNS queries route through the tunnel's built-in resolver and are no longer exposed to your ISP.

Yes, it's safe. Only the resolver IP that made the lookup is logged to show your result — the sites you actually visit are never recorded, and results are purged from our server after 5 minutes. We also recommend checking for a WebRTC leak, a different exposure path.