I just got a call from this number and did not answer. They left a fuzzy sounding message.. woman's voice saying they are calling to inform me that the IRS is filing a lawsuit against me. First time I got such a call and it scared me but thanks to your website I realize now that it was scammers.
Anytime the IRS has a problem with your taxes, they will always mail you a notice first. The notice will have a telephone number for you to call back. They never call you before they send a notice.