area code

• 1. 

  N-COUNT The area code for a particular place is the series of numbers that you have to dial before someone's personal number if you are making a telephone call to that place from a different area. (电话) 区域代码 [美国英语]

  例：

  The area code for western Pennsylvania is 412.

  西宾夕法尼亚的区号是412。