Download is available immediately upon purchase and for the duration of the annual subscription.
A monthly update of this database is not necessary, so we update our database quarterly and recommend that you download quarterly as well.
To update your database without human intervention, we can provide an FTP address for you to write a script to access. Just request it after purchase.
Comma-Separated Values (CSV) Text File
Official U.S. Postal Service five digit ZIP Code
The name of the county in which the ZIP Code is found. This is a one-to-many (ZIP Code to County) relationship.
Federal Information Processing Standard (FIPS) 3‐digit county. FIPS codes are not available for all areas (APO, FPO, some U.S. Territories).
This is the percentage of the zip code area which this county occupies. If there is only one county for the zip code it will be '100'. This is a rounded number, so there could be cases where not all totals equal 100%.
This is for prioritizing the counties within a ZIP Code (sequence 1 is the main county for the ZIP Code).
Official U.S. Postal Service state abbreviation
Federal Information Processing Standard (FIPS) 2‐digit state. FIPS codes are not available for all areas (APO, FPO, some U.S. Territories).
Official city name used by the U.S. Postal Service