Is the US and its territories, Canada and the Caribbean there are 405 area codes. Operation and allocation of the telephone numbers is governed by the NANPA (North American Numbering Plan Administration) company. North American Numbering Plan administration organizes the allocation of area codes. If we look up the area codes, we can say 326 of them in the US, 42 in Canada, 17 non-geographic and 20 others. Rest of them are in the Caribbean and Pacific.