Got a robo-call today from this number (showed as 'Unknown Name') and another - 347-367-6193 (showed as 'Unassigned') - a short time later, both saying this is my 2nd and final notice from the 'US Treasury' (since when would the US Treasury ever call a citizen?) and they are going to contact a judge or magistrate about fraud, if I don't return the call... blah, blah, blah. My sister just got scammed by the MS scam - 'her computer needed to have...', so I knew better than to fall for this.
We got a call too said they are the IRS and if we don't call back it's a federal defense. I never have known the IRS to call. They just don't communicate that way.
Got a call just now. Called back. Said they were the IRS and had a warrant for my arrest if I didn't pay back taxes. I needed to go to a CVS or 7-Eleven to pay. I asked for the arrest warrant number repeatedly. Eventually he said, "your number is '[***]'." I asked again. He said, "it's F U C K 321". Boy, this guy could use some customer service training! Definitely a scam.
I just got the same "IRS" call. Sounded very suspicious to me as well, so I just Googled the number and found this site. So glad I didn't bother calling the number, and looked it up first. Sites like this are so important to avoid scammers.