We are licensees of USPS database products, but we enhance our ZIP Code latitude and longitude database based on decades of experience to provide you with the most accurate product available.
Cannot be resold, transferred, or used to compete with GreatData.com (as outlined in our license agreement).
Due to file size, an FTP directory will be provided and updated as new releases occur 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
A 4-digit Beginning +4 Number. This is the starting range for the ZIP+4 code.
A 4-digit Ending +4 Number. This is the ending range for the ZIP+4 code.
The Latitude is 2 digits, followed by up to 6 decimal positions.
The Longitude begins with a negative sign (-) followed by 2 or 3 digits and has up to 6 decimal positions. The negative sign indicates we are in the Western hemisphere.