The database includes ZIP code, city name, state code and phone area code in United States.

该数据库包括邮政编码，城市名称，国家代码和电话区号在美国。

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For example, a zip code lookup relationship might map the phone area code "650" to the zip codes "94010," "94305," and so on.

例如，邮政编码查询关系可以将电话区号“650”映射到邮政编码“94010”、“94305”等。

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To use it, suppose that the "Missed Calls" list on my mobile phone shows that someone with an area code of 407 tried to call me.

要使用它，假设我移动电话上的“Missed Calls”列表显示一个区号为“407”的人试图呼叫我。

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