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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Switch: PHNXAZMAXNY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
602-602 5 Phoenix AZ 321J HD CARRIER LLC 666   2024-11-15   
602-612 A Phoenix AZ 410H WIDE VOICE, LLC - AZ 666      
602-612 1 Phoenix AZ 410H WIDE VOICE, LLC - AZ 666   2018-06-11   
928-929 A Gila Bend AZ 410H WIDE VOICE, LLC - AZ 666      
928-929 1 Gila Bend AZ 410H WIDE VOICE, LLC - AZ 666   2017-04-24   

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

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