Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

Block: A

<< 1 2 3 4 5 6 7 8 9 10 11 12 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-786 A Traverse City MI BRSPMI095MD  965H FRACTEL, LLC 348      
231-787 A White Cloud MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-788 A Muskegon MI WLKMMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-790 A Freesoil MI GDRPMIBL52Z  829J PAETEC ITEL, LLC 348      
231-791 A Reed City MI GDRPMIBL52Z  829J PAETEC ITEL, LLC 348      
231-792 A Mancelona MI GDRPMIBLX8Z  2550 123.NET, LLC 348      
231-793 A White Cloud MI GDRPMIBL15Z  516C AT&T CORP. 348      
231-794 A Manistee MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-796 A Big Rapids MI BGRPMIMNDS0  9323 MICHIGAN BELL TEL CO 348      
231-797 A Luther MI LTHRMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-798 A Muskegon MI MSKGMIXMRSM  0695 FRONTIER NORTH, INC. - MI 348      
231-799 A Muskegon MI MSKGMIXMRSM  0695 FRONTIER NORTH, INC. - MI 348      
231-800 A Luther MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-803 A Morley MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348      
231-805 A Kaleva MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348      
231-806 A Coral MI GDRPMIBLX8Z  2550 123.NET, LLC 348      
231-808 A Central Lake MI GDRPMIBLX8Z  2550 123.NET, LLC 348      
231-813 A Ludington MI GDRPMIBLX8Z  2550 123.NET, LLC 348      
231-818 A Cheboygan MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-819 A Tustin MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-821 A Holton MI HLTNMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-822 A Beulah MI   817J INTERACTIVE SERVICES NETWORK, INC. 348      
231-823 A Stanwood MI STWDMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-824 A Manton MI MNTNMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-825 A McBain MI MCBNMIMNRS1  9323 MICHIGAN BELL TEL CO 348      
231-826 A Falmouth MI FLMOMIXIDS0  0705 BRIGHTSPEED OF NORTHERN MICHIGAN, INC 348      
231-828 A Twin Lake MI TNLKMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-829 A Tustin MI TUSTMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-830 A Muskegon MI MSKHMIXPDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-831 A East Jordan MI GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-832 A Reed City MI RDCYMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-833 A Wolverine MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-834 A Grant MI GRNTMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-835 A Glen Lake MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-836 A Evart MI GDRPMIBLX8Z  2550 123.NET, LLC 348      
231-837 A Fremont MI GDRPMIBLXGZ  9748 AMERICAN MESSAGING SERVICES, LLC 348      
231-838 A Petoskey MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-839 A Lake City MI LKCYMIXIDS1  0702 BRIGHTSPEED OF MICHIGAN, LLC 348      
231-842 A Cadillac MI GDRPMIBLX8Z  2550 123.NET, LLC 348      
231-843 A Ludington MI LDNGMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-844 A Indian River MI GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348      
231-845 A Ludington MI LDNGMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-846 A Cadillac MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348      
231-848 A Wellston MI KLVAMIXIDS0  0703 KALEVA TEL. CO. 348      
231-852 A Ludington MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-853 A Ravenna MI RVNNMIXGRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-854 A Hesperia MI HSPRMIXHRS0  0695 FRONTIER NORTH, INC. - MI 348      
231-855 A Muskegon MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-856 A Morley MI MRLYMIMNRSA  9323 MICHIGAN BELL TEL CO 348      
231-859 A Dublin MI KLVAMIXIDS0  0703 KALEVA TEL. CO. 348      

<< 1 2 3 4 5 6 7 8 9 10 11 12 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.