Chicago 手机号码格式和区号
Illinois, United States
区号
312
773
872
Chicago 示例号码
(312) 550-1828
+1 3125501828
区号按地区分配，而非按运营商。这标识了号码注册的地点，而非所属网络。
United States 的其他城市
Albuquerque
505
Atlanta
404
Austin
512
Baltimore
410
Boston
617
Charlotte
704
Cleveland
216
Colorado Springs
719
Columbus
614
Dallas
214
Denver
303
Detroit
313
Fort Worth
817
Fresno
559
Honolulu
808
Houston
713
Indianapolis
317
Jacksonville
904
Kansas City
816
Las Vegas
702
Long Beach
562
Los Angeles
213
Louisville
502
Memphis
901
Mesa
480
Miami
305
Milwaukee
414
Minneapolis
612
Nashville
615
New Orleans
504
New York City
212
Oakland
510
Oklahoma City
405
Omaha
402
Philadelphia
215
Phoenix
602
Portland
503
Raleigh
919
Sacramento
916
San Antonio
210
San Diego
619
San Francisco
415
Seattle
206
Tampa
813
Tucson
520
Tulsa
918
Virginia Beach
757
Washington
202