I received a message from this number today as well, sounds automated as they are talking really slow. Officer Heather Gray from the IRS. Says for me or my attorney of record to contact them today for an important time sensitive matter and not to disregard the message or legal action will be taken. I called the number and of course all it does is rings.
They call and keep calling. Say I owe 2700.00 and if I don't pay in a week I'm going to prison for 5 yrs. They claim my driver's license is suspended. Wrong. Got a ticket today and license was good and clear. I k ow my mail carrier personally if she had a certified letter for me she would call me.