Find any 317- phone number in Indiana
The 317 area code is an area code for the state of Indiana, and is part of the North American Numbering Plan. Established in 1947, the area code serves largely Indianapolis and its surrounding area. Subsequent splits of the317 area code include area codes 812, and 765.
The North American Numbering Plan is a system of assigning unique telephone numbers to telephone customers. Numbers are organized into two components, an area code and a local number. Each area code consists of three digit numbers and is assigned to a specific geographic region in the United States and Canada. Subscribers of the same area code share the same prefix and each local part of a number is unique to a single subscriber. The North American Numbering Plan is divided into 86 regions divided by the major population centers, each of which is assigned an area code.