Same thing. I didn't answer as location said it was from Los Altos, CA. IRS investigation, call back immediately or I will be arrested. Deleted message and blocked number.
I received a message telling me to call them immediately it was extremely important. I knew something didn't sound right so I gave them a call. They asked me my name. I said who are you and why did you call me. Then they said I was part of a federal investigation and they needed my name and address. Then when I said if I'm part of some federal investigation shouldn't you know my name and address. Then they hung up on me. I feel bad for the people who fall for this scam.