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Area Codes > 231 > Central Office Codes

Exchange Rate Center State Operating Company
231-712 MUSKEGON MI AMERICAN MESSAGING (AM), INC.
231-714 TRAVERSECY MI CENTURYTEL WIRELESS, INC.-MI
231-715 TRAVERSECY MI DOBSON CELLULAR SYSTEMS, INC.
231-719 MUSKEGON MI VERIZON NORTH INC.-MI
231-720 MUSKEGON MI VERIZON NORTH INC.-MI
231-721 HART MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-722 MUSKEGON MI VERIZON NORTH INC.-MI
231-723 MANISTEE MI AMERITECH MICHIGAN
231-724 MUSKEGON MI VERIZON NORTH INC.-MI
231-725 MUSKEGON MI VERIZON NORTH INC.-MI
231-726 MUSKEGON MI VERIZON NORTH INC.-MI
231-727 MUSKEGON MI VERIZON NORTH INC.-MI
231-728 MUSKEGON MI VERIZON NORTH INC.-MI
231-729 IRONS MI DOBSON CELLULAR SYSTEMS, INC.
231-730 MUSKEGON MI ALLTEL COMMUNICATIONS, INC. - MI
231-731 SHELBY MI LUCRE, INC.
231-732 MORLEY MI LUCRE, INC.
231-733 MUSKEGON MI VERIZON NORTH INC.-MI
231-734 EVART MI AMERITECH MICHIGAN
231-735 TRAVERSECY MI ALLTEL COMMUNICATIONS, INC. - MI
231-736 MUSKEGON MI VERIZON NORTH INC.-MI
231-737 MUSKEGON MI VERIZON NORTH INC.-MI
231-739 MUSKEGON MI VERIZON NORTH INC.-MI
231-740 MUSKEGON MI CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI
231-741 WELLSTON MI LUCRE, INC.
231-742 HART MI ALLTEL COMMUNICATIONS, INC. - MI
231-743 MARION MI AMERITECH MICHIGAN
231-744 MUSKEGON MI VERIZON NORTH INC.-MI
231-745 BALDWIN MI AMERITECH MICHIGAN
231-747 MUSKEGON MI VERIZON NORTH INC.-MI
231-750 MUSKEGON MI ALLTEL COMMUNICATIONS, INC. - MI
231-753 PETOSKEY MI LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI
231-754 MANCELONA MI LUCRE, INC.
231-755 MUSKEGON MI VERIZON NORTH INC.-MI
231-757 SCOTTVILLE MI AMERITECH MICHIGAN
231-758 PETOSKEY MI NEXTEL COMMUNICATIONS, INC.
231-759 MUSKEGON MI VERIZON NORTH INC.-MI
231-760 MUSKEGON MI VERIZON NORTH INC.-MI
231-762 AMBLE MI UPPER PENINSULA TELEPHONE CO.
231-764 FIFE LAKE MI TELNET WORLDWIDE, INC.
231-766 MUSKEGON MI VERIZON NORTH INC.-MI
231-767 MUSKEGON MI VERIZON NORTH INC.-MI
231-768 LE ROY MI AMERITECH MICHIGAN
231-769 MUSKEGON MI VERIZON NORTH INC.-MI
231-773 MUSKEGON MI VERIZON NORTH INC.-MI
231-774 INTERLOCHN MI ACD TELECOM, INC. - MI
231-775 CADILLAC MI AMERITECH MICHIGAN
231-776 PETOSKEY MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-777 MUSKEGON MI VERIZON NORTH INC.-MI
231-778 TRAVERSECY MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-779 CADILLAC MI AMERITECH MICHIGAN
231-780 MUSKEGON MI VERIZON NORTH INC.-MI
231-782 CHEBOYGAN MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-785 FOUNTAIN MI LUCRE, INC.
231-788 MUSKEGON MI VERIZON NORTH INC.-MI
231-789 FRANKFORT MI LUCRE, INC.
231-790 FREESOIL MI LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI
231-791 REED CITY MI LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI
231-792 MANCELONA MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-793 WHITECLOUD MI LUCRE, INC.
231-794 MANISTEE MI DOBSON CELLULAR SYSTEMS, INC.
231-796 BIG RAPIDS MI AMERITECH MICHIGAN
231-797 LUTHER MI AMERITECH MICHIGAN
231-798 MUSKEGON MI VERIZON NORTH INC.-MI
231-799 MUSKEGON MI VERIZON NORTH INC.-MI
231-803 MORLEY MI LEVEL 3 COMMUNICATIONS, LLC - MI
231-805 KALEVA MI ACD TELECOM, INC. - MI
231-806 CORAL MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-808 CENTRAL LK MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-811 MI
231-813 LUDINGTON MI LUCRE, INC.
231-818 CHEBOYGAN MI DOBSON CELLULAR SYSTEMS, INC.
231-821 HOLTON MI VERIZON NORTH INC.-MI
231-822 BEULAH MI TELNET WORLDWIDE, INC.
231-823 STANWOOD MI VERIZON NORTH INC.-MI
231-824 MANTON MI AMERITECH MICHIGAN
231-825 MCBAIN MI AMERITECH MICHIGAN
231-826 FALMOUTH MI CENTURY TELEPHONE CO. OF NORTHERN MICHIGAN
231-827 FIFE LAKE MI LUCRE, INC.
231-828 TWIN LAKE MI VERIZON NORTH INC.-MI
231-829 TUSTIN MI AMERITECH MICHIGAN
231-830 MUSKEGON MI VERIZON NORTH INC.-MI
231-832 REED CITY MI AMERITECH MICHIGAN
231-833 WOLVERINE MI DOBSON CELLULAR SYSTEMS, INC.
231-834 GRANT MI AMERITECH MICHIGAN
231-835 GLEN LAKE MI DOBSON CELLULAR SYSTEMS, INC.
231-836 EVART MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-837 FREMONT MI AMERICAN MESSAGING (AM), INC.
231-838 PETOSKEY MI DOBSON CELLULAR SYSTEMS, INC.
231-839 LAKE CITY MI CENTURYTEL OF MICHIGAN, INC.
231-842 CADILLAC MI LOCAL EXCHANGE CARRIERS OF MICHIGAN, INC.-MI
231-843 LUDINGTON MI VERIZON NORTH INC.-MI
231-844 INDIAN RIV MI LEVEL 3 COMMUNICATIONS, LLC - MI
231-845 LUDINGTON MI VERIZON NORTH INC.-MI
231-846 CADILLAC MI NEXTEL COMMUNICATIONS, INC.
231-848 WELLSTON MI KALEVA TELEPHONE CO.
231-852 LUDINGTON MI DOBSON CELLULAR SYSTEMS, INC.
231-853 RAVENNA MI VERIZON NORTH INC.-MI
231-854 HESPERIA MI VERIZON NORTH INC.-MI
231-855 MUSKEGON MI DOBSON CELLULAR SYSTEMS, INC.