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
623-333 7 Phoenix AZ   9636 QWEST CORPORATION 666   2006-10-23   
623-333 8 Phoenix AZ   9636 QWEST CORPORATION 666   2006-10-23   
623-333 9 Phoenix AZ   9636 QWEST CORPORATION 666   2006-10-23   
623-334 A Phoenix AZ PHNXAZPRDS0  9636 QWEST CORPORATION 666      
623-335 A Phoenix AZ PHNXAZMAXQX  587F BANDWIDTH.COM CLEC, LLC - AZ 666      
623-335 0 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-08-30   
623-335 1 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-08-30   
623-335 2 Phoenix AZ   579F PEERLESS NETWORK OF ARIZONA, LLC - AZ 666   2012-07-01   
623-335 3 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-08-30   
623-335 4 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-08-30   
623-335 5 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-08-30   
623-335 6 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-08-30   
623-335 7 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-08-30   
623-335 8 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-08-30   
623-335 9 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-08-30   
623-336 A Phoenix AZ PHNXAZMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 666      
623-336 0 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2010-05-27   
623-336 1 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2010-05-27   
623-336 2 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2010-05-27   
623-336 3 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2010-05-27   
623-336 4 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2010-05-27   
623-336 5 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2010-05-27   
623-336 6 Phoenix AZ   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2010-07-06   
623-336 7 Phoenix AZ   630E ONVOY, LLC - AZ 666   2010-07-15   
623-336 8 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2010-07-23   
623-336 9 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2010-07-23   
623-337 A Phoenix AZ PHNYAZUXDS0  7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 666      
623-337 0 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-01-06   
623-337 1 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-01-06   
623-337 2 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2005-11-11   
623-337 3 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2005-11-11   
623-337 4 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2005-05-31   
623-337 5 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2005-05-31   
623-337 6 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2004-09-25   
623-337 7 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2004-09-25   
623-337 8 Phoenix AZ   7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 666      
623-337 9 Phoenix AZ   7217 TELEPORT COMMUNICATIONS AMERICA, LLC - AZ 666      
623-340 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-340 0 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-340 1 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-340 2 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-340 3 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-340 4 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-340 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-340 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-340 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-340 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-340 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666      
623-341 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-341 0 Phoenix AZ   6529 T-MOBILE USA, INC. 666      

<< 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: VoIP.ms

Like this site? We accept donations via PayPal.