T-Mobile data connection around my house uses 198.18.53.53 (UDP port 53) as the main domain resolution address to connect to its network. Is that normal? I am new to data networks and don't know whether connections work similar to WiFi connections, which is through a router with a private IP address. T-Mobile connection does not go through my WiFi router, which does not even have mobile data capabilities. It connects directly to T-Mobile network. Is it normal for T-Mobile network to use such a private IP address?