ZIP+4 Address Database

9 Digit ZIP Code Address Database

GreatData’s ZIP+4 Address Database is comparable to the U.S. Postal Service (USPS) ZIP+4 Database. To minimize the download size, it is available in a comma-delimited file (CSV). The size of the download file is around 500MB zipped up and will extract to approximately 4GB. The database contains about 46 million records which includes most of the same fields found in the U.S. Postal Service’s ZIP+4 database product. We excluded some fields that are used internally by the US Postal Service but are rarely used by other businesses. See a list of fields in the Specs & Features section at right and feel free to download a sample.

We are a licensed distributor of U.S. Postal Service (USPS) and Canada PostOM Postal and ZIP Code databases.
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Address List - ZIP+4

This data is well suited for any number of applications including in-house address verification programs. Included with the ZIP+4 database download is a city/state master file to provide valuable cross-reference information. It's normalization reduces the overall download size.

Learn more: View the Product Documentation / Watch our Accuracy Matters video

Database Sources

We are licensees of USPS database products. We use multiple sources and our own internal algorithms based on decades of experience to provide you with the most accurate product available.

Affordability and Simplicity

  • Cost Effective
  • One Year Access
  • Updated Quarterly
  • Unlimited Downloads
  • Unlimited User Licensing Available
  • Supplemented with demographic and marketing data
  • We are a U.S Company - Live, Free Technical Support
  • Money Back Guarantee


Cannot be resold, transferred, or used to compete with (as outlined in our license agreement).

Related Links

ZIP Code Database with Latitude and Longitude
ZIP Code Database without Latitude and Longitude