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: AMSTOHXARS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
740-543 A Amsterdam OH 0615 FRONTIER NORTH, INC. - OH 324      
740-543 1 Amsterdam OH 0615 FRONTIER NORTH, INC. - OH 324      
740-543 3 Amsterdam OH 0615 FRONTIER NORTH, INC. - OH 324      
740-543 4 Amsterdam OH 0615 FRONTIER NORTH, INC. - OH 324      
740-543 8 Amsterdam OH 0615 FRONTIER NORTH, INC. - OH 324      

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

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