964-7##-#### Means it was an Iraqi mobile phone (964 is the country code) (7 means it was a cell phone) in order to return the call you would have needed to dial 011-964-750-#### (the 011 is required to place a phone call from the US to another country).....(note: when you dial a 1 before the area code of a phone number, that is because 1 is the country code of the United States)

If you don't know anyone in Iraq, it was probably just a wrong number, because there are a LOT of Iraqi refugees now living in the US.

No Idea, 964 is a invalid area code.