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
623-291 A Phoenix AZ PHNXAZMAX8Z  732J NUSO, LLC 666      
623-291 0 Phoenix AZ   939H COMMIO, LLC 666   2022-11-22   
623-291 1 Phoenix AZ   732J NUSO, LLC 666   2022-11-21   
623-291 2 Phoenix AZ   939H COMMIO, LLC 666   2022-11-22   
623-291 3 Phoenix AZ   939H COMMIO, LLC 666   2022-11-22   
623-291 4 Phoenix AZ   939H COMMIO, LLC 666   2022-11-22   
623-291 5 Phoenix AZ   939H COMMIO, LLC 666   2022-11-22   
623-291 6 Phoenix AZ   939H COMMIO, LLC 666   2022-11-22   
623-291 7 Phoenix AZ   939H COMMIO, LLC 666   2022-11-22   
623-291 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-12-22   
623-291 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-12-22   
623-292 A Phoenix AZ TEMPAZNR5MD  5562 METROPCS, INC. 666      
623-292 0 Phoenix AZ   5562 METROPCS, INC. 666   2020-10-24   
623-292 1 Phoenix AZ   5562 METROPCS, INC. 666   2020-10-24   
623-292 2 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-10-26   
623-292 3 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-10-26   
623-292 4 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-10-26   
623-292 5 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-10-26   
623-292 6 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-10-26   
623-292 7 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-10-26   
623-292 8 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-10-26   
623-292 9 Phoenix AZ   5562 METROPCS, INC. 666   2020-10-24   
623-293 A Phoenix AZ PHNXAZMADS6  7421 AT&T - LOCAL 666      
623-293 0 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2003-11-04   
623-293 1 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2003-11-04   
623-293 2 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2003-11-04   
623-293 3 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2003-11-04   
623-293 4 Phoenix AZ   7421 AT&T - LOCAL 666      
623-293 5 Phoenix AZ   7421 AT&T - LOCAL 666      
623-293 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2004-01-10   
623-293 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2004-01-10   
623-293 8 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2004-03-06   
623-293 9 Phoenix AZ   7421 AT&T - LOCAL 666      
623-294 A Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666      
623-294 0 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-294 1 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-294 2 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-294 3 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-294 4 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-294 5 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-294 6 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-294 7 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-294 8 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-294 9 Phoenix AZ   630E ONVOY, LLC - AZ 666   2022-09-17   
623-295 A Phoenix AZ PHNXAZMAXQX  587F BANDWIDTH.COM CLEC, LLC - AZ 666      
623-295 0 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-09-21   
623-295 1 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-09-21   
623-295 2 Phoenix AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 666   2011-09-21   
623-295 3 Phoenix AZ   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2011-10-11   
623-295 4 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2011-09-22   

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

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