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.

NPA: 520 [Rate centres in NPA 520] [Dial plan for NPA 520]

NXX: 654

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-654 A Sierra Vista AZ TCSNAZQK3MD  939H COMMIO, LLC 668      
520-654 0 Sierra Vista AZ TCSNAZQK3MD  939H COMMIO, LLC 668   2022-10-27   
520-654 1 Sierra Vista AZ TCSNAZMAX6Y  073H TELNYX LLC 668   2022-12-15   
520-654 2 Sierra Vista AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2023-03-05   
520-654 3 Sierra Vista AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2023-03-05   
520-654 4 Sierra Vista AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2023-03-05   
520-654 5 Sierra Vista AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2023-07-22   
520-654 6 Sierra Vista AZ TCSMAZCH00Z  490J DISH WIRELESS, LLC 668   2023-06-17   
520-654 7 Sierra Vista AZ TCSMAZCH9MD  939H COMMIO, LLC 668   2024-05-01   
520-654 8 Sierra Vista AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668   2022-12-19   
520-654 9 Sierra Vista AZ TCSMAZCHDS0  579F PEERLESS NETWORK OF ARIZONA, LLC - AZ 668   2023-08-10   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.