I'm guessing it should be 48. When the US is placed over the US, its appears to be about the same size (therefore, not including Alaska). EDIT: and there's a

I'm guessing it should be 48. When the US is placed over the US, its appears to be about the same size (therefore, not including Alaska). EDIT: and there's a 'non-contiguous' option for the US that includes Alaska and Hawaii.