Standard DNS is clear text. It doesn't matter if you use your ISP DNS server or not. Either way, they will see the DNS traffic. Forward you DNS requests to ser

Standard DNS is clear text. It doesn't matter if you use your ISP DNS server or not. Either way, they will see the DNS traffic. Forward you DNS requests to servers using DNS with TLS encryption or with a VPN provider. That way the DNS requests can't be seen by your ISP. Using a non-ISP DNS server isn't enough.