ZIP Code API
Smarty
Zipcodestack
PostalDataPI
Geoco.io
Melissa Data Quality
Loqate
usZIPCodes.org
DebugTool
Webvizio
API for US ZIP, ZIP+4, and Canadian postal code data. One unified endpoint set covers North America โ no separate APIs by country or data type.
pct_inside overlap percentage for spatial queries
ZIP Code API
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Smarty - Smarty provides address validation, autocomplete, geocoding and reverse geocoding services covering addresses in over 240+ countries.
Webvizio - This free website feedback tool & website review software allows managers and teams to collaborate on website revisions in real time. Join for free now!
Zipcodestack - Free Zip Code API - Free Postal Code Validation | Zipcodestack
PostalDataPI - The most affordable postal code API. 240+ countries, sub-5 ms responses. Simple, elegant, transparent.
Geoco.io - ridiculously cheap bulk geocoding turn US street addresses into map coordinates and map coordinates into street addresses using our straightforward REST API
Melissa Data Quality - Melissa helps companies to harness Big Data, legacy data, and people data (names, addresses, phone numbers, and emails).