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]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-444 7 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2005-09-07   
623-444 8 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2005-09-07   
623-444 9 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2005-09-07   
623-445 A Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 0 Phoenix AZ   9636 QWEST CORPORATION 666      
623-445 1 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-10-17   
623-445 2 Phoenix AZ   9636 QWEST CORPORATION 666      
623-445 3 Phoenix AZ   9636 QWEST CORPORATION 666      
623-445 4 Phoenix AZ   9636 QWEST CORPORATION 666      
623-445 5 Phoenix AZ   9636 QWEST CORPORATION 666      
623-445 6 Phoenix AZ   9636 QWEST CORPORATION 666      
623-445 7 Phoenix AZ   9636 QWEST CORPORATION 666      
623-445 8 Phoenix AZ   9636 QWEST CORPORATION 666      
623-445 9 Phoenix AZ   9636 QWEST CORPORATION 666      
623-451 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 0 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-451 1 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-451 2 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-451 3 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-451 4 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-451 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-451 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-451 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-451 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-451 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-455 A Phoenix AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666      
623-455 0 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-05-01   
623-455 1 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-05-01   
623-455 2 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-05-01   
623-455 3 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2006-06-05   
623-455 4 Phoenix AZ   2191 ACCIPITER COMMUNICATIONS INC 666   2006-05-07   
623-455 5 Phoenix AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2005-02-21   
623-455 6 Phoenix AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2005-02-21   
623-455 7 Phoenix AZ   9636 QWEST CORPORATION 666   2006-04-17   
623-455 8 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2006-06-05   
623-455 9 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2006-06-05   
623-456 A Phoenix AZ   490J DISH WIRELESS, LLC 666   2025-06-30   
623-456 0 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2025-07-01   
623-456 1 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2025-07-01   
623-456 2 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2025-07-01   
623-456 3 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2025-07-01   
623-456 4 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2025-07-01   
623-456 5 Phoenix AZ   490J DISH WIRELESS, LLC 666   2025-06-30   
623-456 6 Phoenix AZ   490J DISH WIRELESS, LLC 666   2025-08-01   
623-456 7 Phoenix AZ   490J DISH WIRELESS, LLC 666   2025-08-29   
623-456 8 Phoenix AZ   490J DISH WIRELESS, LLC 666   2025-10-01   
623-456 9 Phoenix AZ   490J DISH WIRELESS, LLC 666   2025-10-27   
623-462 A Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666      
623-462 0 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-10-31   
623-462 1 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-10-31   

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

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