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United States Zip Codes provides a free zip code map and list of zip codes by state. Find zip codes by address, zip codes by city, or zip codes by state and compare shipping rates for USPS, UPS, and FedEx.

ZIP Code Database list & Demographics - ZIP Codes by City with Boundary Data - Free ZIP Code Finder - or Download the Data - Maps, Zip Codes, Area Codes, Household Income, Current Population, Multi County Data, Postal codes, MSA codes, CBSA codes...

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...

Provides world time zone database download and API access.

Locator for telephone area codes in the USA, Canada and some Caribbean Islands; lookup cities in an area code and viceversa - detailed information on all codes including map and time zone/curent time

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...

Area code lookup for all US cities or use the area codes locator to find which city a phone area code belongs to.

ZIP Code database - with city, county, latitude, longitude, area code, time zone, FIPS Code, MSA, PMSA, and CBSA codes. Updated Monthly

Telcodata.US - The Telecommunications Database