Who called from 3153704381

Did not leave a voice message.

Said they were from the federal Government.. Was selected fro the treasury to receive a federal grant of $7000.. but there is a one time registration fee of $300.. Said his name was Peter Johnson. Well peter sounded Iranian to me.

It is not the government.  It is a thief trying to steal your money.
It is also illegal to have to pay to get a grant, loan or prize.

Same story.  I got a name of Sean something-or-other to call and "verify" my information when I refused to speak to the person who called me.

Received call from 202-984-8546. When I refused to verify information to the caller they gave me the 315-370-4381 number to call and ask for their sales manager Sean. I then googled the number and got the scam information linked to it.