Slug testing out who's where by making a random call and not leaving a message. Believe it or not, the location data they get from finding out where you are is of value to some data [***]. Hopefully the new privacy rules announced by the FCC in late October 2016 will start to make this low-level form of harassment less lucrative, if not illegal.
new laws, I am sure the crooks will be shaking in their boots. What new privacy laws are you talking about? Where did you get the idea they know where you are located? Maybe the mothership is telling them?