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: TCSMAZCH00Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
520-359 1 Tucson AZ 490J DISH WIRELESS, LLC 668   2024-09-22   
520-606 3 Tucson AZ 490J DISH WIRELESS, LLC 668   2024-12-02   
520-641 3 Benson AZ 490J DISH WIRELESS, LLC 668   2023-06-23   
520-654 6 Sierra Vista AZ 490J DISH WIRELESS, LLC 668   2023-06-17   
520-675 A Tucson AZ 490J DISH WIRELESS, LLC 668      
520-675 9 Tucson AZ 490J DISH WIRELESS, LLC 668   2023-06-17   

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

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