San Diego 手机号码格式和区号
California, United States
区号
619
858
San Diego 示例号码
(619) 550-1828
+1 6195501828
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
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505
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404
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512
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312
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614
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214
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303
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313
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817
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559
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808
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317
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904
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562
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213
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503
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916
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