I received a call at 10:05am and I am on the east coast from a Washington State number - which would be 7am their time. Message was cut off but same as other posters - call about case number and left the phone number.
Got a recorded message, only received part of the message, said that "filing lawsuit against me, call 360-450-0657 to resolve this issue." Hold your breath. This is obviously a scam.
Today, June 15, 2015, I got a call recording say that 'the IRS was preparing a case against me' and that I should call back to: 360-419-6915. My answering machine got the message. Naturally I am not going to call back. I have been getting about 3 or 4 out of area' calls or unknown 800 calls per day. This is the first time I have gotten a call like this with a recorded message.