Received two calls from this number--claiming to be the IRS.  (Received 4 other calls from 2 other numbers--same recording, same voice, same message--all within a 5 hour time period)  We were advised we had to return the call or legal action would begin against us.  One of the calls (while it sounded like a recording) tried to get my sister's name and Social Security number.  THIS IS A TOTAL SCAM, PEOPLE!!!