I'm attempting to use the USPS CityStateLookup API and find that it is only returning the 'primary' city associated with a ZIP code. If there are multiple cities or counties that are covered by a single ZIP code, they are not getting returned.
Am I missing something in the request?
The response below contains only one city state and zip code. However, when I type that code into the USPS web site, I get seven different cities.
<?xml version="1.0" encoding="UTF-8"?>