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: CLMAMOXAXFX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
573-296 5 Hallsville MO 250A CHARITON VALLEY COMMUNICATIONS CORPORATION 521   2020-06-27   
573-476 A Columbia MO 250A CHARITON VALLEY COMMUNICATIONS CORPORATION 521      
573-476 0 Columbia MO 250A CHARITON VALLEY COMMUNICATIONS CORPORATION 521   2015-01-05   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

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