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: 764

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-764 A Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2025-12-21   
520-764 5 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2025-12-21   
520-764 6 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2025-12-21   
520-764 7 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2025-12-21   
520-764 8 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2025-12-21   
520-764 9 Casa Grande AZ   6529 T-MOBILE USA, INC. 666   2025-12-21   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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