My mother received a call from this number, someone claiming to be from the IRS and threatening to have her arrested for unpaid taxes.     Scared my dear sweet mother age 70+) to tears as she has always paid her taxes and been an upstanding member of the human race her entire life - I doubt she's ever had so much as a parking ticket.    Fortunately she called me immediately and I was able to inform her of the scam.    The IRS does not call you; they must send you a letter in the mail.     I wish I could track these scammers down and have them drawn and quartered.