PostGrid has one of the best Address Lookup APIs in the world. After integrating PostGrid’s advanced Address Lookup API, you can simply submit the address to it and access all the details of that address. You can simply use PostGrid’s Address Autocomplete capability to lookup an address by directly entering the address and wait for the PostGrid system to return the complete postal address, including the ZIP+4 code.
PostGrid’s Address Lookup API provides you with every necessary detail of the address you are looking for, including primary number, street name, city, state, and ZIP Code. However, you do need to provide a valid primary number and a street address so that our system can close in on the potential addresses. The more details you provide on the address, the more precise the address lookup can even include the ZIP+4 code.