Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 623 [Rate centres in NPA 623] [Dial plan for NPA 623]

NXX: 309

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-309 A Phoenix AZ PHNXAZMAXQY  624H ONVOY SPECTRUM, LLC 666      
623-309 0 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2024-07-06   
623-309 1 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2023-07-21   
623-309 2 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2023-07-21   
623-309 3 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2023-07-21   
623-309 4 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2023-07-21   
623-309 5 Phoenix AZ   732J NUSO, LLC 666   2023-11-30   
623-309 6 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2023-11-21   
623-309 7 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2023-11-21   
623-309 8 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2023-11-21   
623-309 9 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2023-11-21   

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

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