I don't know how to make international calls, but 801 is the area code, so however you get connected to America (I think you just dial 1), then the number you have.
Norway's country code is 47. The US is 1. So if you need to dial 0047 to dial out to Norway you likely need to dial 001 to dial out to the US.
Also, I'd use skype if I were you, way cheaper if you have an internet connection (2 cents a minute).