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  • Phone Directory 423-420 Detail

    State Major City Time Zone
    Tennessee Chattanooga Eastern / Central (7:06am / 6:06am)

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    Area Code Prefixes

    Prefix Primary City Company County Usage Introduced
    423-420 Madisonville, TN Bellsouth Telecomm Inc DBA South Central Bell Tel Monroe Landline 01/11/1997

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