See CWG's post and find out. When calls are coming from overseas, what can be done, especially with dummy numbers? Give yourself a hand by thwarting their attempts to leave you messages. Can't threaten anyone unless there's an answer of some kind and you don't have to hear anything but a ringing phone, if even that.
My mom received a phone call from this number and also a #202-239-2148, and a #509-320-4122. All stating they were from the IRS and that she owed back taxes and they were filing a law suit against her. They also threatened her with revoking her drivers license(which she does not have one) and sending her to jail. She called me in a panic saying she needed $600 immediately as a down payment and could work out a payment plan after that was received. Luckily I had just taken over her finances, otherwise she would have fallen victim to this scam.