Area code什麼意思

"Area code" is a term used in the North American Numbering Plan (NANP) to refer to the first three digits of a telephone number in the United States, Canada, and some other countries. These digits are used to identify the geographic location or region where the phone number is registered.

For example, if a phone number in the United States is written as (555) 123-4567, the area code would be 555. Area codes are used to route calls to the correct location within the NANP system.

In some cases, area codes are used for non-geographic purposes, such as for toll-free numbers (e.g., 800, 888, 877, etc.) or for premium services (e.g., 900 numbers).

It's important to note that the term "area code" is specific to the NANP system and is not used in the same way in other telephone numbering plans around the world. In many other countries, the equivalent concept might be referred to as an "area code" or a "dialling code," but the term and the way it is used can vary.