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Kansas City, Missouri Zip Codes 64101 64102 64105 64106 64108 64109 64110 64111 64112 64113 64114 64116 64117 64118 64119 64120 64123 64124 64125 64126 64127 64128 64129 64130 64131 64132 64133 64134 64136 64137 64138 64139 64142 64144 64145 64146 64147 64148 64149 64150 64151 64152 64153 64154 64155 64156 64157 64158 64161 64163 64164 64165 64166 64167 64168 64170 64171 64172 64173 64179 64180 64183 64184 64185 64188 64189 64190 64191 64192 64193 64194 64195 64196 64197 64198 64199 64944 64999 Prior to the use of zip codes, cities were divided into regions and mail was addressed as Kansas City 10, Missouri, 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 Kansas City's zip code is 6 it is located in the "6" zone that includes the following areas: Illinois, Kansas, Missouri, and Nebraska.