ZIP + 4^® Product

The ZIP + 4 product is the base reference that can be accessed by an application to assign the correct ZIP + 4 code associated with a physical address. The complete ZIP + 4 product contains approximately 35 million records and is available either in its entirety or by selected state. The product is typically used to build an address-matching directory that is accessed by a separate matching application.

Note: While the ZIP + 4 product contains detailed street data, a complete list of 5-digit ZIP Codes and city place names can only be found in City State Product. Both the City State and ZIP + 4 products are required to perform complete ZIP + 4 encoding and validation. Matching a typical address file to the ZIP + 4 product requires sophisticated software. The majority of companies that wish to ZIP + 4 code their mailing lists either purchase commercially-available CASS Certified™ address-matching software or contract for CASS Certified address-matching services from a service bureau.

The ZIP + 4 product is available on CD-ROM or cartridge.

To obtain current pricing information, please contact the National Customer Support Center at 800-238-3150. An order form can be obtained on-line at RIBBS (Rapid Information Bulletin Board System) in the AIS Products Technical Guide.