A dialling code for a particular city or region is the series of numbers that you have to dial before a particular telephone number if you aremaking a call to that place from a different area.
[mainly British]regional note: in AM, use area code
dialling code in British English
noun
a sequence of numbers which are dialled for connection with another exchange before an individual subscriber's telephone number is dialled
In other languages
dialling code
British English: dialling code /ˈdaɪəlɪŋ kəʊd/ NOUN
A dialling code for a particular city or region is the series of numbers that you have to dial before a particular telephone number if you are making a call to that place from a different area.