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New Orleans, Louisiana Zip Codes 70112 70113 70114 70115 70116 70117 70118 70119 70121 70122 70123 70124 70126 70127 70128 70129 70130 70131 70139 70140 70141 70142 70143 70145 70148 70149 70150 70151 70152 70153 70154 70156 70157 70158 70159 70160 70162 70163 70164 70165 70166 70167 70170 70172 70174 70175 70176 70177 70179 70181 70182 70183 70184 70185 70186 70187 70189 70190 70195 Prior to the use of zip codes, cities were divided into regions and mail was addressed as New Orleans 10, Louisiana, 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 New Orleans's zip code is 7 it is located in the "7" zone that includes the following areas: Arkansas, Louisiana, Oklahoma, and Texas.