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.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 623 [Rate centres in NPA 623] [Dial plan for NPA 623]

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-404 A Phoenix AZ PHNXAZUI8MD  508J CENTURYLINK COMMUNICATIONS, LLC 666      
623-404 0 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2017-07-24   
623-404 1 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2017-07-24   
623-404 2 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2017-07-24   
623-404 3 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2017-07-24   
623-404 4 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2017-07-24   
623-404 5 Phoenix AZ   630E ONVOY, LLC - AZ 666   2017-08-08   
623-404 6 Phoenix AZ   630E ONVOY, LLC - AZ 666   2017-08-08   
623-404 7 Phoenix AZ   508J CENTURYLINK COMMUNICATIONS, LLC 666   2017-06-30   
623-404 8 Phoenix AZ   630E ONVOY, LLC - AZ 666   2017-08-08   
623-404 9 Phoenix AZ   630E ONVOY, LLC - AZ 666   2017-08-08   
623-412 A Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-414 A Phoenix AZ PHNZAZ87PS0  7175 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 666      
623-414 0 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2006-12-18   
623-414 1 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2006-12-18   
623-414 2 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2006-12-18   
623-414 3 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2007-01-22   
623-414 4 Phoenix AZ   7175 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 666   2006-11-03   
623-414 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2007-02-17   
623-414 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2007-02-17   
623-414 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2007-01-06   
623-414 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2007-01-06   
623-414 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2007-01-06   
623-418 A Phoenix AZ PHNXAZMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 666      
623-419 A Phoenix AZ PHNXAZMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 666      
623-419 0 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2012-03-30   
623-419 1 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2012-03-30   
623-419 2 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2012-04-02   
623-419 3 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2012-04-02   
623-419 4 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2012-04-02   
623-419 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2012-04-02   
623-419 6 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2012-05-02   
623-419 7 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2012-05-02   
623-419 8 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2012-05-02   
623-419 9 Phoenix AZ   5562 METROPCS, INC. 666   2014-08-06   
623-428 A Phoenix AZ PHNXAZMAXQX  587F BANDWIDTH.COM CLEC, LLC - AZ 666      
623-428 0 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-01-21   
623-428 1 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-01-21   
623-428 2 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-01-21   
623-428 3 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2011-08-22   
623-428 4 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2011-08-22   
623-428 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2011-08-22   
623-428 6 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2025-01-16   
623-428 7 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2025-01-16   
623-428 8 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-01-21   
623-428 9 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-01-21   
623-432 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-432 0 Phoenix AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2009-11-17   
623-432 1 Phoenix AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2009-11-17   
623-432 2 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2010-03-11   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 >>

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.