dialling code
noun [ C ] UK uk/ˈdaɪ.ə.lɪŋ ˌkəʊd/ us/ˈdaɪ.ə.lɪŋ ˌkoʊd/ (US area code)
(电话)区号
a series of numbers used before the main phone number when you call someone outside your own town or area
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