Google Map Domains
The following countries are currently supported in the Store Locator Plus plugin. These countries determine the default center starting point for location searches and determine which Google locations engine is used when searching for an address. This influences, but does not restrict, which results are returned. Regardless of what country you select as the default, any location in your location database can be returned by the search regardless of the country in which that location resides. This does not effect the zip codes necessarily. Some country postal codes are unique, others are not.