This number called me and said my first name only, I said yes, they asked me if I remember applying for a goverment grant I said "no I have never done that". Then they hung up on me. Who is this company?

To report the fraud, go here:
http://www.grants.gov/web/grants/support/general-support/grant-fraud.html
Their number is listed , along with an email address, at the top of the page.
Also here:
http://www.consumer.ftc.gov/articles/0113-government-grant-scams

This number called me about a government grant an I don't know if it was a scam or not