noun
Used in telecommunications and computing contexts to refer to a numeric prefix identifying a geographic region in a phone number.
アメリカでは、電話番号の最初の3桁がエリアコードです。
In the US, the first three digits of a phone number are the area code.
Variant with interpunct; less common but seen in some contexts.
The native Japanese term for area code, more common in everyday conversation about domestic phone numbers.
Borrowed from English 'area code'.