The jokers keep calling.  This is only one of the numbers, others have been 477-555-0113, 818-698-1514, 508-242-2010.  They obviously have a good telecomm hacker.  I reported ALL of them on https://www.treasury.gov/tigta/contact_report_scam.shtml and would suggest everyone else does as well.  I wish the IRS would take out some Public Service Announcement time on the media nation wide and share the information the gentleman above did.  The IRS will ONLY contact taxpayers using US Mail, and if it's IMPORTANT, it will come certified, trust me ;).  They may provide a phone number for you to initiate contact with them, but the number will be in the mail you receive.  If these idiots start using the US Mail for this, they are IMMEDIATLY in hock for committing Postal Fraud, and the feds will take that on in a hurry.  If this harassment continues, the next unlucky number will get the referee's whistle treatment when I call them back, and i won't just call once.