Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 928 [Rate centres in NPA 928] [Dial plan for NPA 928]

NXX: 512

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-512 A Somerton AZ PHNXAZ28X6X  710A ALLO COMMUNICATIONS, LLC - NE 666   2024-01-18   
928-512 0 Somerton AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2025-10-10   
928-512 1 Somerton AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2024-12-18   
928-512 2 Somerton AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2024-12-18   
928-512 5 Somerton AZ PHNXAZMAXBZ  710A ALLO COMMUNICATIONS, LLC - NE 666   2023-11-24   

Last updated: Tue, 07 Oct 2025 16:47:53 UTC

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