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: 765

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-765 A Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2026-03-05   
520-765 0 Casa Grande AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2026-03-06   
520-765 1 Casa Grande AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2026-03-06   
520-765 4 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2026-03-05   
520-765 5 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2026-03-05   
520-765 6 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2026-03-05   
520-765 7 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2026-03-05   
520-765 8 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2026-03-05   
520-765 9 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2026-03-05   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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