Zip codes

Free ZIP Code Lookup - Free zipcode lookup with areacode, county, latitude, longitude, MSA, PMSA, congressional district, FIPS code, and timezone. Updated monthly.

Free ZIP Code Lookup - Free United States ZIP code lookup. Listing by zip codes or state names.

Canada Post: Postal Code Lookup - Look up postal codes for any address in Canada. Also look up address ranges for given postal codes.

Canada Postal Codes - Free lookup of Canada postal code. Search result includes city name, area code, latitude and longitude.

DirectMailQuotes LLC - Zip code directory lookup as well as postal rates, regulations, glossary of mailing terms.

Free ZIP Code Lookup - Free United States ZIP code lookup. Listing by zip codes or state names.

International Mailing Address Formats - Includes format information and/or examples for many countries, and links to additional references.

KJL Software, Inc. - Databases of US ZIP Code and Area Code information.

Links to Post Office Pages - Links and resources for postal code and international address and address format data.

National Address and ZIP+4 Browser - Interactively browse all address and ZIP+4 records in the United States.

The National Address Server - "Given a valid U.S. postal address, this server attempts to rewrite the address in the proper format along with the ZIP+4 code."

Postage Rates Worldwide - Current postage rates, Domestic, Europe, USA, cards and letters, in over 60 countries

Postage rates worldwide - Directory of mail rates (domestic & international letter rates) with links to the rate calculators or rate tables of postal services in most countries of the world. email rate queries supported.

PostalRates.info - Postal rates, post codes, philately and Postal Authorities around the world.

Simply Zip Codes - ZIP code, city/state, area code lookup along with distance calculations and population data.

SpeedKeys.com - SpeedKeys is a fast and easy zip code, city, state and area code look-up program. It can also generate an optional PostNET Barcode.

Standard US Postal Service Abbreviations - Lists the correct abbreviations for each of the states to be used when addressing envelopes.

United States Postal Service: Zip Code Lookup - Find the postal code for a United States address.

United States ZIP Codes - Free lookup of United States ZIP code. Database subscription available.

ZIP Code Lookup - Lets you get a list of all ZIP codes in a city, county, or area code.

Zip-codes.com - United States. Includes some statistics and histories of the post office and of the development of the ZIP ( zone improvement plan ).

zipdecode - Java applet which maps United States zip codes on a map, reducing possible matches as the number is typed.

ZIPFind's Postal Code Calculator and Data - Calculate distance in miles between two ZIP Codes. Find all ZIP Codes within a radius of a ZIP Code.

Zip code maps and other resources

Zip Code Maps - Maps of every metro, county, and custom radius (USA).

ZIP Code Maps - ZIP code map provider in digital format. Free lookup for US ZIP code, Canadian postal code and Mexican postal code.

U.S. Gazetteer - Enter name or ZIP code in the United States for maps and 1990 census information.

Flattext Map Browser - Create maps of the United States of any width, colors, and layers. Upload a list of zip codes to mark the map for each location in the database.

Hudson Map Company - Makes road maps, street atlases, zip code maps, world map. Store also carries highway maps for all 50 states, U.S. atlases, Canadian road maps, globes, and accessories.

The Map Superstore - Retailer for ZIP code maps and data, business maps, wall maps, globes, and other maps. Product descriptions and photos.

HomeTownLocator Gazetteer - Gazetteer with physical features, cultural features, aerial photos and various maps. U.S. Census 2000 data can be accessed by city, town, county and zip code.

FLATTEXT Database Scripts - Offers custom ZIP Code maps for all states and counties in the United States. Specializing in maps showing political, economic, educational, transportation, and environmental data.

Maponics - Sells carrier route and ZIP code maps as computer files.

Dolph Map Company - Publishes and sells state, county, city, waterways, zip code, hurricane tracking, and wall maps and atlases, specializing in the southeastern United States. Product descriptions and images.

MAPSource, Inc. - Publishes street atlases, wall maps, custom maps, and zip code maps, with a focus on southeastern United States. Also sells map-related products of other publishers. Product and company information.