Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Switch: PHNXAZ28X6X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
623-307 A Phoenix AZ 710A ALLO COMMUNICATIONS, LLC - NE 666      
623-307 1 Phoenix AZ 710A ALLO COMMUNICATIONS, LLC - NE 666   2023-06-18   
928-512 A Somerton AZ 710A ALLO COMMUNICATIONS, LLC - NE 666   2024-01-18   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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