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.
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Switch: CLMASCTLXZX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
803-977 A Columbia SC 939H COMMIO, LLC 434      
839-262 A Columbia SC 939H COMMIO, LLC 434   2024-04-05   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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