What is the local host IP?

5 Methods to Solve the Localhost Refused to Connect Error

To run a Flutter application which is connected to the localhost, on a real device, first the real device and the machine which acts as localhost should be connected on the same network . Note: PORT_NUMBER is an integer from 1024 to 49151. Also you need to make sure the Firewall on windows allow you to connect.

On almost all networking systems, localhost uses the IP address 127.0. 0.1 . That is the most commonly used IPv4 “loopback address” and it is reserved for that purpose.