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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OCN: 756G WIDE VOICE, LLC - MA

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
339-207 1 Lynn MA CMBRMABEZMD  128   2016-05-12   
857-957 A Boston MA CMBRMABEZMD  128      
857-957 1 Boston MA CMBRMABEZMD  128   2014-11-21   

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

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