Who called from 2012764331

I do not know where this phone number is from I call it back and it says it's been that it's not in service

It is a scammer....sounds Nigerian. Claims they work for the US grants office and you have been chosen to receive a free grant. Sorry, the US government does not call people, especially from another country to give away money. They have several spins....been called at least 40 times.

I keep getting a call from this number but when I called back it says it's not a working number

Repeated requests to stop having calls and they keep calling