Can a zipcode contain more than one city. For example, it seems that Foster City, CA and San Mateo,CA both share the same zipcode: 94404.
i have a data dump that labelled "San Mateo" as a primary city, and "Foster City" as an 'acceptable city'. which is why I was confused...who determines San Mateo is a primary city.:p
i even noticed Google defaults to the 'primary city' of San Mateo when searching only for the zipcode 94404