It can be difficult to find out who has been calling you restricted. It can be done in some cases if you work hard. Some phone companies list the numbers on your phone bill at the end of the month. Another suggestion is get the date and times and if it becomes harassing, you can get the police to trace the call. If you actually talk to the person when they call, you can catch them off guard. Doing this sometimes, they will give you the number. You can always set up your phone to not accept any phone calls that are restricted through your company. Some phone carriers can have special features that could help you find out. If this does not help then I suggest go to the police if it becomes frequent. If someone truly wants to get a hold of you or an emergency, they would leave you a voice mail. So talk with your phone company and see what options they have and then go from there.