Check which DNS resolvers are handling your queries. If using a VPN, these should be your VPN provider's DNS servers, not your ISP's.
Our DNS leak test determines which DNS servers are resolving your queries. When using a VPN, all DNS requests should go through the VPN's DNS servers. If your ISP's DNS servers appear in the results, you have a DNS leak—meaning your browsing activity may be visible to your ISP despite using a VPN. This test helps verify your VPN is working correctly.