Official site of the United States Postal Service (USPS), featuring postage rate calculator, Express Mail tracking, ZIP codes, change of address forms, and online ...

Accurate and up-to-date ZIP code databases and programs with ZIP code related information such as area code, county, latitude, longitude, MSA, PMSA, FIPS code, time zone, and place FIPS. ZIP code data available for immediate download. All ZIP code databases and programs are updated every month.

Zip Express Software: is a utility allowing easy look up of U.S. Zip Codes and their associated cities, states, counties, area codes, time zones and current time. Search by Zip, City, County, State or Area code. Auto paste data in any format into applications or the clipboard via assignable hot keys. Build your own pasting formats. Copy entire ranges of Zip Code data to the clipboard or printer. Display dialing codes, time zone and current time for countries around the world. For Windows.

Nielsen Claritas helps you attract the best customers by understanding the demographic characteristics and buying behaviors using census, lifestyle and population data.

For data quality management tools, mailing software, consumer and residential mailing lists, address verification, and NCOA services, visit MelissaData.com, a leading source of cost effective, direct marketing database solutions.