National Telephone Enterprises 20 N Wacker Dr Chicago IL Tel (312) 263-7608 Telephone              MAP General Tele-Communications 500 N Michigan Ave Chicago IL Tel (312) 464-2000 Telephone              MAP Verizon 205 N Michigan Ave # 1100 Chicago IL Tel (312) 470-2121 Telephone              MAP BTI Communications Group 150 N Michigan Ave Chicago IL Tel (312) 563-1999 Telephone              MAP Telephone and Data Systems Inc 30 N La Salle St Chicago IL Tel (312) 630-1900 Telephone              MAP Cingular Wireless 168 N State St Chicago IL Tel (312) 726-1147 Telephone              MAP Telephone Pioneers of America 225 W Randolph St Chicago IL Tel (312) 727-7333 Telephone              MAP Talk America Inc 205 N Michigan Ave Ste 4201 Chicago IL Tel (312) 729-1286 Telephone              MAP Buying All Phones 111 W Jackson Blvd Chicago IL Tel (312) 742-4273 Telephone              MAP Mfs Telecom 180 N Stetson Ave Chicago IL Tel (312) 803-2000 Telephone              MAP Octel Communications 225 N Michigan Ave Chicago IL Tel (312) 856-0261 Telephone              MAP Southwestern Telephone and Cable 770 N La Salle Dr Ste 400 Chicago IL Tel (312) 867-9440 Telephone              MAP Calliope Inc 225 N Michigan Ave Ste 902 Chicago IL Tel (312) 938-3656 Telephone              MAP