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Zip API US REST API v1.1 - Developers

Zip API USA provides a free way to look up city and state based on zip code. This API also has additional data in regards to population, age and hospital information based on zip code. Hospital data returned includes hospital name, address, phone, geolocation, naics description, website, helipad access, population, number of beds. The population and age data comes from the 2010 Census, while hospital information comes from Homeland Infrastructure Foundation-Level Data (HIFLD). Developers can use the hospital lookup information to help track the COVID-19 outbreak.
Zip API US