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Area Codes > 773 > Central Office Codes

Exchange Rate Center State Operating Company
773-934 CHICGOZN03 IL T-MOBILE USA, INC.
773-935 CHICGOZN04 IL AMERITECH ILLINOIS
773-936 CHICGOZN07 IL T-MOBILE USA, INC.
773-937 CHICGOZN08 IL SPRINT COMMUNICATIONS COMPANY, L.P. - IL
773-938 CHICGOZN04 IL GLOBAL CROSSING LOCAL SERVICES, INC.-IL
773-939 CHICGOZN08 IL T-MOBILE USA, INC.
773-941 CHICGOZN10 IL T-MOBILE USA, INC.
773-942 CHICGOZN02 IL GLOBAL CROSSING LOCAL SERVICES, INC.-IL
773-944 CHICGOZN02 IL RCN TELECOM SERVICES OF ILLINOIS, INC. - IL
773-946 CHICGOZN10 IL BROADWING COMMUNICATIONS, LLC - IL
773-947 CHICGOZN07 IL AMERITECH ILLINOIS
773-948 CHICGOZN08 IL MCIMETRO, ATS, INC.
773-949 CHICGOZN01 IL CELLULAR PAGING USA, INC.
773-950 IL
773-951 CHICGOZN03 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-952 CHICGOZN07 IL T-MOBILE USA, INC.
773-953 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-954 CHICGOZN10 IL T-MOBILE USA, INC.
773-955 CHICGOZN07 IL AMERITECH ILLINOIS
773-957 CHICGOZN03 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-958 IL AMERITECH ILLINOIS
773-959 IL AMERITECH ILLINOIS
773-960 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-961 CHICGOZN02 IL AMERITECH ILLINOIS
773-962 CHICGOZN07 IL AMERITECH ILLINOIS
773-963 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-964 CHICGOZN10 IL T-MOBILE USA, INC.
773-965 CHICGOZN01 IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL
773-966 CHICGOZN07 IL BROADWING COMMUNICATIONS, LLC - IL
773-967 CHICGOZN09 IL MCIMETRO, ATS, INC.
773-968 CHICGOZN03 IL T-MOBILE USA, INC.
773-969 CHICGOZN04 IL T-MOBILE USA, INC.
773-971 CHICGOZN10 IL T-MOBILE USA, INC.
773-972 CHICGOZN01 IL NEW CINGULAR WIRELESS PCS, LLC - IL
773-973 CHICGOZN02 IL AMERITECH ILLINOIS
773-974 CHICGOZN11 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-975 CHICGOZN04 IL AMERITECH ILLINOIS
773-976 IL
773-977 CHICGOZN02 IL OVATION COMMUNICATIONS OF ILLINOIS, INC.
773-978 CHICGOZN09 IL AMERITECH ILLINOIS
773-979 CHICGOZN10 IL UNITED STATES CELLULAR CORP. - ILLINOIS
773-980 CHICGOZN10 IL AMERITECH ILLINOIS
773-981 CHICGOZN10 IL MCIMETRO, ATS, INC.
773-982 CHICGOZN10 IL T-MOBILE USA, INC.
773-983 CHICGOZN10 IL T-MOBILE USA, INC.
773-984 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-985 CHICGOZN11 IL MCIMETRO, ATS, INC.
773-986 CHICGOZN08 IL T-MOBILE USA, INC.
773-987 CHICGOZN10 IL GLOBALCOM, INC.-IL
773-988 CHICGOZN01 IL T-MOBILE USA, INC.
773-989 CHICGOZN02 IL AMERITECH ILLINOIS
773-990 CHICGOZN03 IL AMERITECH ILLINOIS
773-991 CHICGOZN03 IL SPRINT SPECTRUM L.P.
773-992 CHICGOZN03 IL AMERITECH ILLINOIS
773-993 CHICGOZN01 IL MULTI COMPUTER SYSTEMS, INC.
773-994 CHICGOZN07 IL AMERITECH ILLINOIS
773-995 CHICGOZN10 IL AMERITECH ILLINOIS
773-996 CHICGOZN08 IL T-MOBILE USA, INC.