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Tulsa, Oklahoma Zip Codes 74101 74102 74103 74104 74105 74106 74107 74108 74110 74112 74114 74116 74117 74119 74120 74121 74126 74127 74128 74129 74130 74131 74133 74134 74135 74136 74137 74141 74145 74146 74147 74148 74149 74152 74153 74155 74156 74157 74158 74159 74169 74170 74171 74172 74183 74184 74186 74187 74189 74192 74193 74194 Prior to the use of zip codes, cities were divided into regions and mail was addressed as Tulsa 10, Oklahoma, 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 Tulsa's zip code is 7 it is located in the "7" zone that includes the following areas: Arkansas, Louisiana, Oklahoma, and Texas.