Find any 640- phone number in New Jersey
The 640 area code is a telephone number used in the North American Numbering Plan (NANP). It was one of the original area codes created for New Jersey in 1947. It focusses on a specific geographic area of the state, encompassing the counties of Mercer, Hunterdon, and parts of Somerset and Warren. The 640 area code is included in the New Jersey numbering plan, meaning that it can reach any other area code in the state by dialing just seven digits.
The North American Numbering Plan (NANP) was introduced in 1947 and enables customers to dial telephone numbers within a particular region using a standard ten-digit format. This system assigns three-digit area codes that are used to distinguish specific geographic regions, such as states, within the NANP. Certain areas might also include one or more additional numbers that act as a prefix or suffix to the area code. With the NANP, customers are able to dial within their local area, as well as make their long-distance calls with the same telephone number.