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Image:Areacode214.svg|This map is clickable; click on an area code to go to the corresponding article. Map of Texas (in blue) and border codes, with area codes 214/469/972 in red.|right|350px|thumb poly 121 10 199 10 199 69 179 69 173 80 187 88 183 106 162 103 170 116 156 116 141 123 126 110 117 116 Area code 806 poly 178 69 173 80 188 88 183 106 199 108 199 103 230 112 261 119 263 111 274 109 278 112 289 93 281 91 261 89 256 94 251 84 223 83 218 74 204 74 199 69 Area code 940 poly 236 17 224 27 222 51 229 65 236 68 246 68 255 55 257 38 250 21 243 16 Area codes 682 and 817 poly 264 111 261 118 271 130 287 129 279 112 276 112 274 108 Area codes 682 and 817 #poly 314 7 297 27 300 54 310 71 325 72 337 62 341 49 341 27 329 7 Area codes 214, 469, and 972 #poly 279 111 286 129 291 137 299 123 299 118 297 113 283 104 Area codes 214, 469, and 972 poly 358 104 348 104 329 91 326 91 323 93 317 91 312 93 301 93 295 98 289 93 283 104 297 113 300 122 291 137 298 145 286 164 288 168 307 171 307 159 360 146 Area codes 430 and 903 poly 122 0 117 154 20 153 21 161 0 161 1 1 Area code 505 poly 21 154 21 160 49 189 62 195 64 186 60 179 74 178 74 183 88 181 88 161 80 154 Area code 915 poly 118 114 117 153 78 154 87 161 87 182 73 184 74 178 60 178 64 185 62 196 75 230 108 251 121 241 126 224 160 225 169 234 171 196 156 196 158 175 153 172 154 152 160 152 161 160 165 152 170 152 171 116 155 115 142 123 126 110 Area code 432 poly 361 255 341 275 350 316 374 324 389 299 383 257 373 250 Area codes 281, 713, and 832 poly 345 223 339 226 338 231 344 239 334 240 333 250 311 225 304 208 307 201 316 201 316 190 329 190 328 200 348 214 Area codes 281, 713, and 832 poly 334 251 321 258 313 262 293 235 278 212 276 211 267 193 278 185 277 177 288 168 295 169 293 196 303 200 305 214 314 229 Area code 979 poly 360 146 307 159 307 171 294 169 293 196 302 200 304 208 307 201 317 201 316 189 330 190 329 201 349 214 353 204 345 181 369 168 Area code 936 poly 344 239 333 240 333 250 371 226 367 222 375 212 374 196 377 187 368 167 345 181 352 205 345 222 338 227 338 231 343 238 343 240 333 239 333 250 Area code 409 poly 312 261 278 211 271 212 275 224 254 234 262 244 238 250 238 263 234 264 234 271 215 280 220 290 233 292 233 303 227 307 230 316 270 316 280 341 281 341 276 312 283 287 313 262 Area code 361 poly 282 345 277 349 272 349 268 343 252 343 227 331 216 310 207 290 198 275 196 262 215 259 220 259 223 263 234 263 235 271 215 281 220 291 233 291 234 303 228 307 230 315 270 315 Area code 956 poly 223 211 218 227 218 231 222 235 232 222 232 214 Area code 210 poly 148 245 136 245 127 256 137 271 161 274 176 262 174 250 161 244 Area code 210 poly 242 190 209 190 207 197 171 196 168 233 181 246 193 274 198 275 195 261 222 259 223 264 238 263 240 250 263 245 254 233 276 223 271 212 260 209 256 215 247 212 Area code 830 poly 276 211 271 213 260 209 257 216 247 211 242 191 242 166 257 161 261 162 258 180 277 182 277 186 267 193 Area code 512 poly 286 129 271 129 262 118 230 112 230 120 226 120 225 127 241 138 246 134 257 138 258 142 254 145 257 161 260 162 259 181 278 183 277 175 289 168 285 163 299 146 Area code 254 poly 162 104 170 116 170 152 164 152 161 161 161 151 153 151 153 172 158 178 156 197 208 197 209 192 243 191 242 166 257 161 254 144 258 141 259 137 245 132 242 137 224 126 226 120 231 120 231 113 198 103 199 109 162 103 Area code 325 poly 358 121 360 147 370 167 377 163 386 166 390 174 387 181 394 187 398 187 399 121 Area code 318 poly 370 168 376 185 375 206 376 213 366 222 371 226 399 230 400 187 393 187 388 180 391 173 386 166 377 162 Area code 337 poly 345 57 347 104 356 103 359 121 400 121 399 77 384 78 375 65 374 50 363 50 358 55 358 63 Area code 870 poly 122 0 122 10 199 10 200 70 207 77 218 76 221 82 249 86 256 93 262 89 272 95 276 99 279 92 288 94 295 99 303 95 315 92 326 92 347 103 345 71 329 69 323 72 312 70 304 64 298 60 279 59 272 69 246 66 243 70 232 66 230 69 217 47 224 29 235 17 244 17 248 19 269 21 266 0 Area code 580 desc bottom-left 214, 469, and 972 are the North American telephone area codes for Dallas, Texas and most of the eastern portion of the Metroplex. The main area code, 214, was one of the original area codes established in October 1947. It originally covered the entire northeastern quadrant of Texas, from Fort Worth to the border with Arkansas and Louisiana. The rotary dialing technology of the time generated 10 dial pulses per second, requiring a full second to dial a zero. Given this, the North American Numbering Plan Administrator wanted to keep dialing time to a minimum for densely populated areas. This saved time not only for a maximum number of telephone subscribers, but reduced congestion in the electromechanical telephone switching systems of the time. For this reason, Dallas-Fort Worth, which was well into a dramatic period of growth that continues to this day, was given an area code that required only seven dial pulses: 2 + 1 + 4. In 1954, most of Tarrant County was combined with much of the eastern portion of area code 915 to form area code 817. In 1990, the entire eastern portion of the 214 area code was split off as area code 903. The 1990 split was intended as a long-term solution, but within five years 214 was close to exhaustion due to the rapid growth of the Metroplex as well as the popularity of cell phones, fax machines and pagers. Additionally, the entire Metroplex is a single LATA, so several numbers in 817 weren't available for use. To solve this problem, in 1995 all of the old 214 territory outside of the Dallas Central Business District was split off as area code 972. Within only two years, however, both 214 and 972 were on the verge of exhaustion. To solve the problem, area code 469 was introduced on July 1, 1999 as an overlay for most of the eastern portion of the Metroplex. At the same time, the 214-972 boundary was "erased," and 972 was converted into an additional overlay for the entire region. The result was three area codes overlaying the same area, with ten-digit dialing required for all calls. Counties served by these area codes: :Collin, Dallas, Denton, Ellis, Johnson, Kaufman, Navarro, Rockwall and generally eastern parts of Tarrant Towns and cities served by these area codes: :Addison, Allen, Anna, Arlington, Avalon, Bardwell, Bedford, Blue Ridge, Carrollton, Cedar Hill, Celina, Cockrell Hill, Colleyville, Combine, Copeville, Coppell, Crandall, Dallas, DeSoto, Duncanville, Elmo, Ennis, Euless, Farmers Branch, Farmersville, Fate, Ferris, Flower Mound, Forney, Forreston, Frisco, Garland, Glenn Heights, Grand Prairie, Highland Park, Highland Village, Hurst, Hutchins, Irving, Italy, Josephine, Kaufman, Lancaster, Lavon, Lewisville, Little Elm, Lucas, Maypearl, McKinney, Melissa, Mesquite, Midlothian, Milford, Murphy, Nevada, Oak Leaf, Palmer, Pecan Hill, Plano, Princeton, Prosper, Red Oak, Rice, Richardson, Rockwall, Rosser, Rowlett, Royse City, Sachse, Scurry, Seagoville, Sunnyvale, Talty, Terrell, The Colony, University Park, Venus, Waxahachie, Westminster, Weston, Wilmer and Wylie. In addition, Dallas-Fort Worth International Airport is served by area code 972. ==See also== *List of Texas area codes * (List of exchanges from AreaCodeDownload.com, 936 Area Code ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Area codes 214, 469, and 972」の詳細全文を読む スポンサード リンク
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