Here is a nice little mobile phone based application to locate/track Indian mobile phone numbers. It can be very useful if you receive spam calls from unknown numbers. You can track the region where the number is registered as well as the service provider for any Indian mobile phone number. You simply need to enter the first 4-5 digits of a mobile phone number and it will provide you with the state, reference city and the mobile phone service provider. The application can also be used for finding out STD codes in India. The application is Java based so it will work with all mobile phones with Java installed. Please note that the application only supports locating Indian mobile phone numbers.
Click here to download the application.
To install, kindly unzip the file and install it on your phone using the .jar installation file included in the package. For help with the installation feel free to post queries on the comments section below.
PS: I am not the developer for this application.