I received a call from this number - in english with heavy foreign accent saying they were from IRS demanding my name - at 5:45 in the morning. IRS would not call at such an early hour nor would they need my name nor would they call on a cell phone. They hung up on me as soon as I said the IRS would never call at this strange hour.
Same automated Nikki Johnson message informing either I or attorney to call back immediately to avoid legal action. Reported on IRS scam site - links above. Thanks to those that included that in their posts.
Just go this call about 10 minutes ago 3/4/15,. Female robotic voice claiming she was Officer Nickie Johnson from the IRS and legal action will be taken if I did not return the call. Call coming from Novato CA