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Des Moines, Iowa Zip Codes 50301 50302 50303 50304 50305 50306 50307 50308 50309 50310 50311 50312 50314 50315 50316 50317 50318 50319 50320 50321 50322 50323 50325 50327 50329 50330 50331 50332 50333 50334 50335 50336 50338 50339 50340 50347 50359 50360 50361 50362 50363 50364 50367 50368 50369 50380 50381 50391 50393 50394 50395 50396 50397 50398 50936 50940 50947 50950 50980 50981 Prior to the use of zip codes, cities were divided into regions and mail was addressed as Des Moines 10, Iowa, for example, to show which region of the city the mail was intended for. As cities continued to grow this system was not sufficient and was replaced by the Zip Code. ZipCodes went into effect in 1963. The United States Postal Service (USPS) initially used a cartoon character Mr. Zip to promote the use of zip codes. In 1983 the zipcode added the last four digits in an attempt to more narrowly define an address. The first three digits of a zip code indicate the sectional center facility which will ultimately sort and distribute that piece of mail. All mail to that 5 digit zipcode will first arrive at the sectional center facility then after sorting continue along to its exact destination. Since the first digit of Des Moines's zip code is 5 it is located in the "5" zone that includes the following areas: Iowa, Minnesota, Montana, North Dakota, South Dakota, and Wisconsin .