Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 520 [Rate centres in NPA 520] [Dial plan for NPA 520]

NXX: 614

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-614 A Tucson AZ TCSNAZMAXHX  630E ONVOY, LLC - AZ 668      
520-614 0 Tucson AZ   630E ONVOY, LLC - AZ 668   2022-05-05   
520-614 1 Tucson AZ   630E ONVOY, LLC - AZ 668   2022-05-05   
520-614 2 Tucson AZ   630E ONVOY, LLC - AZ 668   2022-04-25   
520-614 3 Tucson AZ   630E ONVOY, LLC - AZ 668   2022-04-25   
520-614 4 Tucson AZ   630E ONVOY, LLC - AZ 668   2022-04-25   
520-614 5 Tucson AZ   630E ONVOY, LLC - AZ 668   2022-04-25   
520-614 6 Tucson AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 668   2022-04-26   
520-614 7 Tucson AZ   630E ONVOY, LLC - AZ 668   2022-04-25   
520-614 8 Tucson AZ   630E ONVOY, LLC - AZ 668   2022-04-25   
520-614 9 Tucson AZ   579F PEERLESS NETWORK OF ARIZONA, LLC - AZ 668   2022-04-26   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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