Just got one of these myself a few minutes ago. I don't owe money to the IRS so I figured it must be a scam and voila! Thanks 800notes! great source for this kind of information.
Received a call from 415-506-2392. It was a recording asking me to call back before an action is taken. The call did not identify where it was calling from. At the end of the message, it said "Good bye and take care".
Got a call today from 415-506-2392. Same as all the comments above. Knew it wasn't the IRS and would never return a call like that with the number given in a message. Would have called the IRS directly.
415-506-2392 claiming i owe money to irs... second call this week the other was 202-864-1154... threatening to take legal action against me. Just fyi the IRS will send written notice before contacting you also they will not ask for personal info!!! The letters usually have a case number that they refer to.