This is the IRS.  I spoke with an agent named Cheryl about form CP2000 I sent in as a result of a 1098 for my mortgage insurance not agreeing with what the bank submitted.  Problem resolved.  

I just got a call from that number. Didn't answer cause it didn't show the callers ID in the screen. Called back from another phone and got a recording machine informing that number has been disconnected. Weird.....

Yes it's from IRS.

http://www.irs.gov/uac/Tax-Scams-Consumer-Alerts
http://800notes.com/forum/ta-8c2f64bf2b91fa5/irs-warns-of-telephone-scam

Report the Calls to the real IRS here:
•report the incident to the Treasury Inspector General for Tax Administration at 800-366-4484.
•You can also file a complaint with the Federal Trade Commission at FTC.gov. Add "IRS Telephone Scam" to the comments in your complaint.

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Do consider maybe getting a call blocking device or phone.. You can google them and many are around $60.00 or so.

JUST RECEIVED A CALL FROM THIS NUMBER THEY ASKED FOR MY SSN I DIDNT PROVIDE IT SO SHE TOLD ME SHE NEEDED IT IN ORDER TO ACCESS MY FILE. SHE SAID SHE COULD CALL ME LATER ANY TIME BEFORE 11PM SINCE THAT IS THE TIME THEY CLOSE, I TOLD HER TO CALL ME BACK AT 7PM. BUT I RETURNED THE CALL IMMIDIETLEY AFTER WE HUNG UP AND IT SAID THE NUMBER WAS NOT IN SERVICE.