if they are not calling from your physical location, or your phone line, then they are spoofing the caller ID, it is very simple, they just need a spoofcard http://spoofcard.com and can enter in whatever they want to show up on the caller id... there is not much that you can do, except advise the callers that this is what is happening, and that when they get these calls, they should dial *57 to put a trace on the last incoming call (but they may be charged a fee for this) you can contact your local phone provider, and ask to speak with there fraud department, or call 1-866-trace-4-u for more info..

Contact your provider. The company has processes to assist you.

I have been getting repeated calls daily from upset people who are getting numerous calls "from this number" every day, though I haven't called them. When I called my provider, they said if someone is calling from a private/blocked number and the call recipient has these numbers blocked, they can enter whatever number they want and have that displayed. I have an idea who this is (few people have THIS much time on their hands or gradeschool mentality!), but is there any way for ME to stop these people from doing this? I don't want to change my number because I've been using it as I grow my personal business over the past year and a number of people know it now. The only thing I've been able to think of is to leave a message on my voicemail stating that I'm not the one making these calls and they need to have the number traced & press charges with the police. Does anyone else know of anything I can do?