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
英汉双解词典收录81607条英汉双解翻译词条，基本涵盖了全部常用单词的读音、翻译及用法，是英语学习的有利工具。