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U.S. Area Codes by Number: 3



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US AREA CODES STARTING WITH THE NUMBER 3
301 Maryland 321 Florida
302 Delaware 323 California
303 Colorado 330 Ohio
304 West Virginia 331 Illinois
305 Florida 334 Alabama
307 Wyoming 336 North Carolina
308 Nebraska 337 Louisiana
309 Illinois 339 Massachusetts
310 California 341 California
312 Illinois 347 New York
313 Michigan 351 Massachusetts
314 Missouri 352 Florida
315 New York 360 Washington
316 Kansas 361 Texas
317 Indiana 369 California
318 Louisiana 385 Utah
319 Iowa 386 Florida
320 Minnesota