HEATKEYS

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Free online searches and ZIP code database downloads, with zip codes and latitude and longitude for performing distance calculations. Includes full documentation.

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 Code, City, County, State or Area Code. Auto paste data in any format int...

Hotaru CMS is an open source content management system, written in PHP.

Get shipping rates, buy stamps, print postage, track a package, look up a ZIP Code? - Find the mailing products and services you need at USPS.com.

Our contact data quality solutions deliver point-of-entry address validation, integrated batch updates, advanced duplicate management and reduced postage.

WordPress Plugins by Lance Cleveland

Zipoid (Free ZIP Code finder) - free ZIP Code verification, look-up and distance calculator tool.

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 da...