National ZIP+4 Address Database TM (March 2018 data)US Postal Service street address database for the entire USA! More than 40 million records. Includes street addresses, ZIP+4, carrier route, county, and congressional district information!
Here is the street address data you need to write your own address verification program at a price you can afford!
The National ZIP+4 Address Database consists of 929 separate address files in fixed-length ASCII format, organized by 3-digit ZIP code. Each file contains a variable number of fixed-field-length ASCII ZIP+4 (9-digit ZIP code) address records of 182 bytes each, with no record delimiter (no carriage return nor line feed characters). Within a given file, the records are sorted by 5-digit ZIP code. Each file is compressed as a zip archive (WinZip).
This database also includes the US Postal Service city-state file, which contains a complete listing of the approximately 42,500 5-digit ZIP codes currently assigned by the USPS. This file has approximately 77,800 fixed-field-length ASCII records of 129 bytes each. This file is also compressed as a zip archive (WinZip).
Here are some of the fields contained in each ZIP+4 address record:
Where an address record identifies an exact street address, the primary low address and the primary high address fields are identical.
Click here to download sample records in fixed-length ASCII format.
Click here to download sample records in fixed-length ASCII format, compressed with WinZip.
An address range record defines the lowest and highest street numbers which can exist for a given "block face" as well as the ZIP+4, carrier route number, and county name which apply to all addresses which may actually exist on that block face. In many cases exact street numbers are not actually defined in the database. This, by the way, is exactly the case for all commercial products based on the USPS ZIP+4 address database.
Matching the ZIP+4 Records to the City-State File
CAUTION - THIS DATABASE IS VERY LARGE AND NOT EASY TO USE. IT IS BEST SUITED FOR EXPERIENCED SOFTWARE DEVELOPERS ONLY!
National ZIP+4 Address Database Information Source
* Quarterly subscription: Annual fee. You'll receive the latest National ZIP+4 Address Database every three months for a full year, starting with March 2018.
** Monthly subscription: Annual fee. You'll receive the latest National ZIP+4 Address Database every month for a full year, starting with March 2018.
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