The telephone number 469-200-1807 is a fake. I have been receiving calls from it saying there is a "suspension notice against your social security number." Scammers carry out the majority of their schemes by phone. They try to convince callers they are legitimate IRS employees by spoofing caller ID information, using fake or even real IRS employee badge numbers, and having key information about their targets.
Callers try to convince their targets to send them immediate payment through a preloaded debit card, gift card, or wire transfer—which can be hard to track.2 Once you discover you've been scammed, recovering your money is virtually impossible. Scammers may also ask targets to hold up their credit cards to the camera in their phones or computers via Skype, in an attempt to get their payment information.