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217 Cent. Illinois: Springfield 56 T1 line providers 309 W Cent. Illinois: Peoria 55 T1 line providers 312 Illinois: Chicago 56 T1 line providers 618 S Illinois: Centralia 48 T1 line providers 630 W NE Illinois, western suburbs of Chicago 56 T1 line providers | 708 Illinois: southern and western suburbs of Chicago 55 T1 line providers 773 Illinois: city of Chicago, outside the loop 52 T1 line providers 815 NW Illinois: Rockford, Kankakee 55 T1 line providers 847 Northern NE Illinois: northwestern suburbs of chicago 56 T1 line providers 224 Northern NE Illinois: Evanston, Waukegan, Northbrook 3 T1 line providers |