Illinois Local Exchange Boundary Map and County OverlayThe Illinois Telecommunications Association has prints of a full color 24" x 42" Illinois telephone exchange boundary map with the latest updates. To accompany the Illinois Exchange Boundary Map, we have developed a clear overlay with county border lines. Exchange boundary maps and county overlays are available for purchase: $60 for first Exchange Boundary Map or County Overlay Order Exchange Boundary Map & County Overlay as a set at $110 per set (includes postage) Purchase Exchange Map
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