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Area Codes > 231 > Central Office Codes

Exchange Rate Center State Operating Company
231-856 MORLEY MI AMERITECH MICHIGAN
231-859 DUBLIN MI KALEVA TELEPHONE CO.
231-861 SHELBY MI VERIZON NORTH INC.-MI
231-862 HOXEYVILLE MI ACE TELEPHONE CO. OF MICHIGAN, INC.
231-863 SCOTTVILLE MI LUCRE, INC.
231-864 BEAR LAKE MI CENTURYTEL OF MICHIGAN, INC.
231-865 FRUITPORT MI VERIZON NORTH INC.-MI
231-866 SUTTONSBAY MI DOBSON CELLULAR SYSTEMS, INC.
231-867 CHIPPEWALK MI CENTURYTEL MIDWEST-MIDWEST, INC.
231-869 PENTWATER MI VERIZON NORTH INC.-MI
231-871 BEULAH MI DOBSON CELLULAR SYSTEMS, INC.
231-872 REED CITY MI DOBSON CELLULAR SYSTEMS, INC.
231-873 HART MI VERIZON NORTH INC.-MI
231-874 WOLVERINE MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-875 FRUITPORT MI LUCRE, INC.
231-876 CADILLAC MI AMERITECH MICHIGAN
231-877 NORTHPORT MI LUCRE, INC.
231-878 CADILLAC MI ALLTEL COMMUNICATIONS, INC. - MI
231-879 FIFE LAKE MI AMERITECH MICHIGAN
231-881 PETOSKEY MI DOBSON CELLULAR SYSTEMS, INC.
231-882 BEULAH MI AMERITECH MICHIGAN
231-883 TRAVERSECY MI DOBSON CELLULAR SYSTEMS, INC.
231-884 CADILLAC MI DOBSON CELLULAR SYSTEMS, INC.
231-885 MESICK MI ACE TELEPHONE CO. OF MICHIGAN, INC.
231-886 KALKASKA MI DOBSON CELLULAR SYSTEMS, INC.
231-887 MANISTEE MI DOBSON CELLULAR SYSTEMS, INC.
231-889 ONEKAMA MI AMERITECH MICHIGAN
231-890 TRAVERSECY MI AMERITECH MICHIGAN
231-893 WHITEHALL MI VERIZON NORTH INC.-MI
231-894 WHITEHALL MI VERIZON NORTH INC.-MI
231-896 CORAL MI LUCRE, INC.
231-898 CARR MI CARR TELEPHONE CO.
231-899 NORTHPORT MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-902 HART MI TELNET WORLDWIDE, INC.
231-903 MUSKEGON MI LEVEL 3 COMMUNICATIONS, LLC - MI
231-907 LUDINGTON MI DOBSON CELLULAR SYSTEMS, INC.
231-908 MCBAIN MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-911 MI
231-912 REED CITY MI DOBSON CELLULAR SYSTEMS, INC.
231-916 MANCELONA MI LEVEL 3 COMMUNICATIONS, LLC - MI
231-920 CADILLAC MI DOBSON CELLULAR SYSTEMS, INC.
231-922 TRAVERSECY MI AMERITECH MICHIGAN
231-923 HART MI NEXTEL COMMUNICATIONS, INC.
231-924 FREMONT MI AMERITECH MICHIGAN
231-925 SCOTTVILLE MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-926 KALKASKA MI LUCRE, INC.
231-928 FREMONT MI AMERITECH MICHIGAN
231-929 TRAVERSECY MI AMERITECH MICHIGAN
231-930 BEULAH MI ACD TELECOM, INC. - MI
231-931 MANCELONA MI ARCH WIRELESS HOLDINGS, INC.
231-932 TRAVERSECY MI AMERITECH MICHIGAN
231-933 TRAVERSECY MI AMERITECH MICHIGAN
231-935 TRAVERSECY MI AMERITECH MICHIGAN
231-936 SCOTTVILLE MI LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI
231-937 HOWARDCITY MI VERIZON NORTH INC.-MI
231-938 TRAVERSECY MI AMERITECH MICHIGAN
231-941 TRAVERSECY MI AMERITECH MICHIGAN
231-942 CADILLAC MI AMERITECH MICHIGAN
231-943 TRAVERSECY MI AMERITECH MICHIGAN
231-944 TRAVERSECY MI CYNERGYCOMM.NET, INC. - MI
231-946 TRAVERSECY MI AMERITECH MICHIGAN
231-947 TRAVERSECY MI AMERITECH MICHIGAN
231-950 MI
231-952 WOLVERINE MI ARCH WIRELESS HOLDINGS, INC.
231-955 MUSKEGON MI DOBSON CELLULAR SYSTEMS, INC.
231-958 MI
231-959 MI
231-962 KALEVA MI LUCRE, INC.
231-970 BEAR LAKE MI DOBSON CELLULAR SYSTEMS, INC.
231-972 MECOSTA MI CENTURYTEL MIDWEST-MIDWEST, INC.
231-974 GRANT MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-976 MI
231-981 WHITEHALL MI VERIZON NORTH INC.-MI
231-994 LKLEELANAU MI ACD TELECOM, INC. - MI
231-995 TRAVERSECY MI AMERITECH MICHIGAN