https://www.byteplant.com/address-validator/zip-code-api.html
International Postcode/ZIP API - 240 Countries World-Wide | Byteplant
Byteplant's International Postcode/ZIP API provides address and location data for 240 countries world-wide. Our APIs power use cases like International Address...
zip apiworld wideinternationalpostcodecountries
https://www.uszip.com/zip_api.php
ZIP Codes API
The ZIP Codes API from STANDS4 enables you to instantly get the US location behind the zip code.
zip codes api