Area coe 413 is the area code for Western Massachusetts. It is the largest area code area by land area covered in the state, extending from the western state line to the border of Worcester County, though including two Worcester county towns, Hardwick and Warren, while excluding several eastern Franklin County towns, Orange, New Salem, Warwick and Wendell and covering from border to border north to south. Even though Western Massachusetts has no overlay area code (in other words it has only one area code), it requires 10 digit dialing for calls that go outside of designated calling areas.