It's not the IRS, it is a scammer/extortionist calling from India. He is trying to scam money out of you. Don't answer the call. Don't give them any information.
Got message from "Mike Anderson". Saying not to ignore this message and that warrant has been issued. Glad I looked up number and saw these posts. Will not call back
I also got a call from these guys. They told me to write down the warrant ID which was 00/100/3636. And, everything similar to what Luke above said. But, I call that number 551-333-1884 again and told them to stop harassing me. Immediately, that guys started giving me bad words in Hindi ( which is Indian language). Since, I am also Indian so I also started giving them bunch of bad words. Just be alert. These guys are from India. And, IRS would never ask for money or out of court settlement on phone.