Local Calling Guide

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

NXX: 457

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-457 A Muskegon MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348      
231-457 0 Muskegon MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348      
231-457 1 Muskegon MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348   2005-02-17   
231-457 2 Muskegon MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2005-10-30   
231-457 3 Muskegon MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2008-01-13   
231-457 4 Muskegon MI GDRPMIBL40Z  318J COMCAST IP PHONE, LLC 348   2008-01-15   
231-457 5 Muskegon MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2006-02-05   
231-457 6 Muskegon MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2006-02-05   
231-457 7 Muskegon MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2006-04-16   
231-457 8 Muskegon MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2006-04-16   
231-457 9 Muskegon MI GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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