This caller calls from several Number in Nassau county using the 601, 602, 603, 606 and 607 exchanges. 516 607-1300, 516 607-1012, 516 606-1304, 516 606-1016. if you answer any of these calls they will hang up. You may soon start getting calls From (347) 389-0010 and 917 725-2143.  If you answer these the call is a computer recorded voice that says the IRS is about to sue you and you you should call back the stated number with case file. The IRS will not call you It IS  a SCAM