I don't answer unknown numbers but this one left a message.  Called in from "Out of Area" with Houston, TX number 346-824-5969 then the mechanical voice, in bad grammar, stated they were the IRS and this was their last attempt to contact me about taxes owed.  The automated voice stated the IRS was going to file suit unless I called them back at 253-336-5321  immediately.  Know this was a scam as I pay my taxes diligently, besides knowing the IRS does not call but sends letters.