This is a fresh scam. Received a voicemail from someone using AT&T TrueVoice using an American female voice asking for me to call back regarding a debt owed on back taxes to the IRS. Looked up the information traced back to the #, and came up with a latitude / longitude location that has no valid reference to the IRS HQ. Called the number, detected an abnormally long pause and drop in the rings, and then a sluggish individual on the other end with a foreign accent misidentified their location. Advised them I was contacting my state AG's office immediately regarding the matter.

IRS never gives direct dial phone numbers unless an agent hands you their business card (which is very rare unless you have received formal audit notice in the mail & you have reported directly to your local agent to respond to the request). This is a fresh scam.