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: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-666 A Casa Grande AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666      
520-666 0 Casa Grande AZ   630E ONVOY, LLC - AZ 666   2017-11-10   
520-666 1 Casa Grande AZ   630E ONVOY, LLC - AZ 666   2017-11-10   
520-666 2 Casa Grande AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2017-11-11   
520-666 3 Casa Grande AZ   630E ONVOY, LLC - AZ 666   2017-11-18   
520-666 4 Casa Grande AZ   630E ONVOY, LLC - AZ 666   2017-11-18   
520-666 5 Casa Grande AZ   630E ONVOY, LLC - AZ 666   2017-11-18   
520-666 6 Casa Grande AZ   630E ONVOY, LLC - AZ 666   2017-11-10   
520-666 7 Casa Grande AZ   630E ONVOY, LLC - AZ 666   2017-11-18   
520-666 8 Casa Grande AZ   630E ONVOY, LLC - AZ 666   2019-06-20   
520-666 9 Casa Grande AZ   630E ONVOY, LLC - AZ 666   2019-06-20   

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

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