Wire Center Boundaries
Wire Centers are the basic unit of geography for the telecom industry. They describe the
organization of the local telephone exchange system. Each Wire Center serves a unique set of
telephone numbers within a fixed geographic area. A telephone number consist of three parts:
Area Code (3 digits), Prefix (3 digits) and the Line Number (4 digits). Typically, each Prefix is
assigned to one specific Wire Center. This means that numbers are assigned to wire centers in
blocks of 10,000.
Attributes and Table Structure
A Wire Center Boundary is a polygon of the area which contains the numbers in
a Wire Center and contain several attributes
