A DNS leak occurs when your DNS requests go through your ISP's DNS servers instead of your VPN's – despite using a VPN or proxy. This lets your ISP (or third parties) see which websites you visit, even though you believe you are protected.

How does a DNS leak happen despite a VPN?

Causes include misconfigured VPN clients, the operating system sending DNS requests outside the tunnel, or IPv6 requests the VPN does not cover. This test shows which DNS servers are actually used.

How do I fix a DNS leak?

Enable your VPN's DNS leak protection, force the VPN's own DNS servers, disable IPv6 if your VPN does not support it, or use a trusted DNS provider.

DNS Leak Test – Check if your DNS is leaking

Your connection

Public IP216.73.216.31

ProviderAmazon.com, Inc.

ASNAS16509

LocationColumbus, Vereinigte Staaten

Leak status

Detected DNS resolvers

Detecting DNS resolvers...

What do the results mean?

public The resolver belongs to a public provider (e.g. Cloudflare, Google, Quad9) – not your connection provider. This is the normal case, not a leak.

your connection The resolver is in the same network (ASN) as your internet connection. Without a VPN this is normal – with a VPN it is only fine if it is your VPN's DNS server.

A real DNS leak occurs when the DNS servers of your ISP appear here while you are using a VPN. Compare the providers above with your VPN provider.

My IP DNS Leak WebRTC DNS Lookup IP Lookup

DNS Leak Test – protect your privacy

A DNS leak test checks whether your DNS requests go through your VPN tunnel or bypass it. When using a VPN, all DNS requests should go through the VPN's DNS servers – not your ISP's servers. If DNS requests leak, your ISP can see which websites you visit despite using a VPN.

This test triggers DNS lookups for unique hostnames and records which resolvers actually ask for them. The resolvers are grouped by provider; a real leak is indicated when your own ISP's network appears among them while a VPN is active.