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
623-440 7 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2018-07-09   
623-440 8 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2018-07-09   
623-440 9 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2018-07-09   
623-444 A Phoenix AZ PHNYAZUXDS0  7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 666      
623-444 0 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2006-08-19   
623-444 1 Phoenix AZ PHNYAZUXDS0  7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 666      
623-444 2 Phoenix AZ PHNZAZZJDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2005-04-24   
623-444 3 Phoenix AZ PHNYAZUXDS0  7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 666      
623-444 4 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2005-09-07   
623-444 5 Phoenix AZ PHNZAZZJDS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2005-04-24   
623-444 6 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2005-09-07   
623-444 7 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2005-09-07   
623-444 8 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2005-09-07   
623-444 9 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2005-09-07   
623-445 A Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 0 Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 1 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2022-10-17   
623-445 2 Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 3 Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 4 Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 5 Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 6 Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 7 Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 8 Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-445 9 Phoenix AZ DRVYAZNODS0  9636 QWEST CORPORATION 666      
623-451 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 0 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 1 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 2 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 3 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 4 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 5 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 6 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 7 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 8 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-451 9 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-455 A Phoenix AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666      
623-455 0 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2006-05-01   
623-455 1 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2006-05-01   
623-455 2 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2006-05-01   
623-455 3 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2006-06-05   
623-455 4 Phoenix AZ PEORAZFSDS0  2191 ACCIPITER COMMUNICATIONS INC 666   2006-05-07   
623-455 5 Phoenix AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2005-02-21   
623-455 6 Phoenix AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2005-02-21   
623-455 7 Phoenix AZ BRDSAZMADS0  9636 QWEST CORPORATION 666   2006-04-17   
623-455 8 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2006-06-05   
623-455 9 Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666   2006-06-05   
623-456 A Phoenix AZ   490J BOOST SUBSCRIBERCO L.L.C. 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   

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Last updated: Fri, 10 Jul 2026 02:55:48 UTC

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