All United States ZIP codes currently in use, their preferred and alternate city names recognized by the USPS, full county name, full state name and abbreviation.

Metropolitan statistical areas ... this product contains the June 2003 revised Combined Statical Area (CSA), Core-Based Statistical Area (CBSA), and statistical area division with type codes released by the Office of Management and Budget (OMB).

We also include the circa 2000 Metropolitan Statistical Area (MSA), Primary Metropolitan Statistical Area (PMSA), and Consolidated Metropolitan Statistical Area (CMSA) codes for easy cross reference with the new definitions.

Geographic latitude and longitude coordinates in decimal degree format with six digit decimal position precision.

All area codes including overlays ... this product contains all area codes in use within a particular ZIP code.

Full time zone and daylight savings time plus FIPS state and county codes are include as well.