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Dallas, Texas Zip Codes 75201 75202 75203 75204 75205 75206 75207 75208 75209 75210 75211 75212 75214 75215 75216 75217 75218 75219 75220 75221 75222 75223 75224 75226 75227 75228 75229 75230 75231 75232 75233 75234 75235 75236 75237 75238 75239 75240 75241 75242 75243 75244 75245 75246 75247 75248 75250 75251 75252 75253 75254 75258 75260 75261 75262 75263 75264 75265 75266 75267 75270 75275 75277 75283 75284 75285 75286 75287 75295 75303 75310 75312 75313 75315 75320 75323 75326 75336 75339 75342 75346 75353 75354 75355 75356 75357 75359 75360 75363 75364 75367 75368 75370 75371 75372 75373 75374 75376 75378 75379 75380 75381 75382 75386 75387 75388 75389 75390 75391 75392 75393 75394 75395 75396 75397 75398 Prior to the use of zip codes, cities were divided into regions and mail was addressed as Dallas 10, Texas, 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 Dallas's zip code is 7 it is located in the "7" zone that includes the following areas: Arkansas, Louisiana, Oklahoma, and Texas.