MCallShow is an application that lets you know the information of the phone number,like  which network that number belongs to, including City, Region, and Country. It will also tell you all those information when you dial a number. Even you can manually launch the application and feed the number there and get the info about that number.

Once you install this app you need to download the database of the country which is available for free, at a time you can install single or multiple databases. It works without any issue, but when you want to manually search the info about phone number by launching the app, you need to select the country database if you are using multiple database.