Forum Discussion
Zip Codes
Those extra four digits are for courier routes related to specific streets (or large buildings) and the side of the street (or floor of a large building). Just to be clear, each 5-digit zip has many 4-digit extensions, so the extension has to be determined based on the rest of the address.
You'll probably want to use some sort of service like an API to look up the extension. Here's one resource I found via Google that might help: https://www.smarty.com/articles/zip-4-code
Unfortunately the extra 4 digits are not already in the data source. I need to find a way to bring them in from somewhere else. Just havent had much luck in my searches so far.
Those extra four digits are for courier routes related to specific streets (or large buildings) and the side of the street (or floor of a large building). Just to be clear, each 5-digit zip has many 4-digit extensions, so the extension has to be determined based on the rest of the address.
You'll probably want to use some sort of service like an API to look up the extension. Here's one resource I found via Google that might help: https://www.smarty.com/articles/zip-4-code