Find zip code by city and state and find city and state by zip codes.
http://www.askyp.com/Zipcode/Offers postal codes search by location and state.
http://www1.auspost.com.au/postcodes/List of Postal Codes and its corresponding city.
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http://www.brainyzip.comFind Postal Code by street address, municipality and province.
http://www.canadapost.ca/tools/pcl/bin/advanced-e.aspLook up postal codes for any address in Canada. Also look up address ranges for given postal codes.
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http://www.postdanmark.dk/contentfull.dk?lang=enZip code directory lookup as well as postal rates, regulations, glossary of mailing terms.
http://www.directmailquotes.com/postalregs/index.cfmA detailed database of all US Zip Codes, City Information and Area Codes.
http://www.findazip.comOffers zip codes search.
http://www.laposte.fr/sna/rubrique.php3?id_rubrique=59Free zipcode lookup with areacode, county, latitude, longitude, MSA, PMSA, congressional district, FIPS code, and timezone. Updated monthly.
http://zipinfo.com/search/zipcode.htmLook up postal codes, the German equivalent of U.S. zip codes, for any German address.
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http://www.bitboost.com/ref/international-address-formats.htmlDatabases of US ZIP Code and Area Code information.
http://www.kjlsoftware.com/Links and resources for postal code and international address and address format data.
http://www.grcdi.nl/linkspo.htmProvides detailed map of all US zip codes, powered by google map.
http://www.myzipcodemap.com/Interactively browse all address and ZIP+4 records in the United States.
http://www.semaphorecorp.com/cgi/form.htmlCurrent postage rates, Domestic, Europe, USA, cards and letters, in over 60 countries
http://www.atms.ch/ratesDirectory 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.
http://www.geocities.com/wallstreet/exchange/1161/Search US and Canada postal codes by cities, towns and area codes.
http://www.postalcodelookup.ca/Postal rates, post codes, philately and Postal Authorities around the world.
http://www.postalrates.infoZIP code, city/state, area code lookup along with distance calculations and population data.
http://www.simplyzipcodes.comSpeedKeys is a fast and easy zip code, city, state and area code look-up program. It can also generate an optional PostNET Barcode.
http://www.speedkeys.comTranslates valid U.S. postal addresses to the proper format along with the ZIP+4 code.
http://www.cedar.buffalo.edu/adserv.htmlOffers US postal code database, search by state or city name.
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http://www.zip-area.comLook up a zip code by address, city and State.
http://zip4.usps.com/zip4/welcome.jspFind the postal code for a United States address.
http://zip4.usps.com/zip4/Lets you get a list of all ZIP codes in a city, county, or area code.
http://www.getzips.com/zip.htmOffers ZIP Code lookup, distance and radius search.
http://www.zipcodedownload.com/Lookup/Calculate distance in miles between two ZIP Codes. Find all ZIP Codes within a radius of a ZIP Code.
http://www.zipfind.net/Provides search for ZIP and area codes for a city.
http://www.1zipcodes.comA zip code search offering city demographics, local weather and maps.
http://www.aresllc.com/zip-codes-finder/Find postal codes for USA, French and Australia. Reverse look-up available.
http://www.findapostcode.comUnited States. Includes some statistics and histories of the post office and of the development of the ZIP (zone improvement plan).
http://www.zip-codes.com/Java applet which maps United States zip codes on a map, reducing possible matches as the number is typed.
http://acg.media.mit.edu/people/fry/zipdecode/