The telephone exchange boundary data base, originally digitized in 1989, was updated in 2007 by incorporating all boundary changes made to the original maps. The PUCO plans to keep these maps up-to-date, updating any maps involved in a boundary change.  Last updated: August 13, 2008.

The quadrangle maps are in PDF format, with each digital topographic map overlaid by boundary lines for telephone exchanges. Individual layers in the PDF files can be toggled off and on, in order to see the boundary lines more clearly.

Individual maps may be accessed using either the quadrangle code or the quadrangle name. It is also possible to select an individual telephone exchange, which then brings up a map for that exchange showing all the overlapping quadrangles. Quadrangle names and codes, as well as the telephone service areas and exchanges, are shown on the Telephone Exchange Quadrangle Index Map.

Each boundary map is made up of two layers:
1) a 24,000 scale USGS topographic map as the base layer. These maps are Copyright 2007 Maptech Inc.
2) a telephone exchange boundary layer shown using dark purple dashed lines

The overlay maps are best suited to printing, or to viewing in Adobe reader at the actual size (Zoom to Actual Size on the View menu). When printed full size, each map is 22 x 34 inches. The printed output can be scaled down in Adobe reader, and readable maps can be printed at 11 x 17 inches. Adobe reader can also be used to print portions of the map, using the Current View option on the print dialog. In this way good maps can be produced on 8 1/2 by 11 inch paper.