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Omaha, Nebraska Zip Codes 68046 68101 68102 68103 68104 68105 68106 68107 68108 68109 68111 68112 68113 68114 68116 68117 68118 68119 68120 68122 68127 68130 68131 68132 68133 68134 68135 68136 68137 68138 68142 68144 68145 68147 68152 68154 68155 68157 68164 68172 68176 68178 68179 68180 68181 68182 68183 68197 68198 Prior to the use of zip codes, cities were divided into regions and mail was addressed as Omaha 10, Nebraska, 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 Omaha's zip code is 6 it is located in the "6" zone that includes the following areas: Illinois, Kansas, Missouri, and Nebraska.