The best way to find out who is calling and where the call is coming from is to use a caller ID location tracker app. The best ones out there will give you the details you need, no matter what the reason for the call is. This free app lets you track all incoming and outgoing calls and will display the location where the call is coming from.

You can use this app to track all numbers that are on your contact list, and you can also track numbers that are not on your contact list. This app will display the location of the caller in real-time, and you can see if the caller is on the other side of the country or city.