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: TCSNAZMAXMY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-659 A Nogales AZ 732J NUSO, LLC 668      
520-659 1 Nogales AZ 732J NUSO, LLC 668   2022-11-17   
520-681 2 Nogales AZ 732J NUSO, LLC 668   2023-11-27   

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

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