The State of Illinois counties of:
Boone, Bureau, Carroll, Cook, DeKalb, DuPage, Grundy, Henderson, Henry, Jo Davies, Kane, Kankakee, Kendall, Knox, Lake, LaSalle, Lee, McHenry, Marshall, Mercer, Ogle, Putnam, Rock Island, Stark, Stephenson, Warren, Will, Winnebago and Whiteside.
The State of Iowa:
East of Interstate Highway 35 excluding the city of Des Moines
The State of Wisconsin excluding the counties of:
Douglas, Bayfield, Washburn, Burnett, Polk, Sawyer, Rusk, Chippewa, Barron, St. Croix, Dunn, Pierce, and Eau Claire