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
623-309 1 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2023-07-21   
623-309 2 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2023-07-21   
623-309 3 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2023-07-21   
623-309 4 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2023-07-21   
623-309 5 Phoenix AZ   732J NUSO, LLC 666   2023-11-30   
623-309 6 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2023-11-21   
623-309 7 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2023-11-21   
623-309 8 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2023-11-21   
623-309 9 Phoenix AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2023-11-21   
623-312 A Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666      
623-312 0 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2013-07-25   
623-312 1 Phoenix AZ   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2013-07-31   
623-312 2 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2013-01-11   
623-312 3 Phoenix AZ   318J COMCAST IP PHONE, LLC 666   2013-06-26   
623-312 4 Phoenix AZ   5562 METROPCS, INC. 666   2013-02-21   
623-312 5 Phoenix AZ   5562 METROPCS, INC. 666   2013-02-21   
623-312 6 Phoenix AZ   5562 METROPCS, INC. 666   2013-02-21   
623-312 7 Phoenix AZ   5562 METROPCS, INC. 666   2013-02-21   
623-312 8 Phoenix AZ   5562 METROPCS, INC. 666   2013-02-21   
623-312 9 Phoenix AZ   5562 METROPCS, INC. 666   2013-11-15   
623-313 A Phoenix AZ PHNXAZMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 666      
623-313 0 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2006-05-28   
623-313 1 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2006-06-12   
623-313 2 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2006-06-12   
623-313 3 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-08-19   
623-313 4 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-08-19   
623-313 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-08-19   
623-313 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-08-19   
623-313 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-08-19   
623-313 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2006-08-19   
623-313 9 Phoenix AZ   9636 QWEST CORPORATION 666   2006-08-11   
623-320 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-320 0 Phoenix AZ   073H TELNYX LLC 666   2022-12-01   
623-320 1 Phoenix AZ   073H TELNYX LLC 666   2022-12-01   
623-320 2 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2022-11-22   
623-320 3 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2022-11-22   
623-320 4 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2022-11-22   
623-320 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-11-20   
623-320 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-11-20   
623-320 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-11-20   
623-320 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-11-20   
623-320 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-11-20   
623-321 A Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666      
623-322 A Phoenix AZ PHNXAZMAX1Z  318J COMCAST IP PHONE, LLC 666      
623-323 A Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666      
623-323 0 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-04-19   
623-323 1 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-04-19   
623-323 2 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-04-19   
623-323 3 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-04-19   
623-323 4 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-04-19   

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

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