Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
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NPA: 623 [Rate centres in NPA 623] [Dial plan for NPA 623]

NXX: 776

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-776 A Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-776 0 Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-776 1 Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-776 2 Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-776 3 Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-776 4 Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-776 5 Phoenix AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2005-07-09   
623-776 6 Phoenix AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2005-07-09   
623-776 7 Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-776 8 Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-776 9 Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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