ZIPsales™ ZIP Codes — All U.S. Postal Service ZIP codes, with the following information


ZIP Code City County State City U.S. Postal Service Preferred City Name County FIPS Code (Unique code assigned by the Federal Government) Default Flags (Show most populated city and county for each ZIP Code)	Inside/Outside City Flag (Show where the ZIP code is situated) Includes all cities and counties for ZIP codes that cross jurisdictions Available in a Windows look-up system Available in ASCII format, for import into other systems or spreadsheets Additional ZIP + 4 Cross reference file More information on the +4 Product Monthly updates from the Internet

How ZIP codes relate to Sales Taxes

ZIP codes -- being created by the U.S. Postal Service for the sole purpose of delivering mail -- are not consistent with the political boundaries of city, county, and state. While 23% of ZIP codes cross city, or county lines, most of the ZIP code products on the market, provide only a single city, county, and state per ZIP code.

In order to apply the appropriate sales tax rates for each ZIP code, CCH goes beyond what the USPS provides. We research all the possible boundaries of every given ZIP code, using geographic data provided by the U.S. government and private companies, to pinpoint the exact geographic location of every ZIP code, and all the cities and counties it crosses into.
Because ZIP codes are periodically deleted, added, or realigned, taxpayers must monitor these changes to retain accurate sales tax determinations.

ASCII File Record Layout

Field Name       Length    Description
----------       ------    -----------
ZIP Code         5         5 digit ZIP code
City             28        ZIP code place name
County           25        County name
State            2         State abbreviation
USPS City        28        U.S. Postal Service preferred city name
County FIPS      5         Unique federal code identifying each county
County Default   1         Default county indicator for city/ZIP code
Default          1         Default city indicator for ZIP code
Geo Code         10        Geographic code representing state, county, and city
Inout            1         Indicates whether ZIP code is inside or outside city
ZIP + 4 To County Cross Reference