Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 478 [Rate centres in NPA 478] [Dial plan for NPA 478]

NXX: 399

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
478-399 A Butler GA MACNGAMT1MD  6116 LEVEL 3 COMMUNICATIONS, LLC - GA 446   2024-07-05   
478-399 7 Butler GA MACNGAMT1MD  6116 LEVEL 3 COMMUNICATIONS, LLC - GA 446   2024-07-05   
478-399 9 Butler GA   145J TERRA NOVA TELECOM INC. 446   2025-05-23   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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