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
623-272 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-02-07   
623-272 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-02-07   
623-273 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-273 0 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-09-19   
623-273 1 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2021-10-21   
623-273 2 Phoenix AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2021-08-23   
623-273 3 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-08-22   
623-273 4 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-08-22   
623-273 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-08-22   
623-273 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-08-22   
623-273 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-08-22   
623-273 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-08-22   
623-273 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-08-22   
623-274 A Phoenix AZ PHNDAZ91DS5  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666      
623-274 0 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-12-10   
623-274 1 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-12-10   
623-274 2 Phoenix AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2021-12-09   
623-274 3 Phoenix AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2021-12-09   
623-274 4 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-12-10   
623-274 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-12-10   
623-274 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-12-10   
623-274 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-12-10   
623-274 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-12-10   
623-274 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-12-10   
623-275 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-275 0 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-11   
623-275 1 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-05   
623-275 2 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-05   
623-275 3 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-05   
623-275 4 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-05   
623-275 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-05   
623-275 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-05   
623-275 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-05   
623-275 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-05   
623-275 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-11-05   
623-276 A Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666      
623-276 0 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2022-06-14   
623-276 1 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2022-06-14   
623-276 2 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2022-06-14   
623-276 3 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2022-06-14   
623-276 4 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2022-06-14   
623-276 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-06-13   
623-276 6 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-06-13   
623-276 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-06-13   
623-276 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-06-13   
623-276 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2022-06-13   
623-277 A Phoenix AZ PHNXAZMAXMD  6010 NEW CINGULAR WIRELESS PCS, LLC 666      
623-277 0 Phoenix AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 666   2010-09-16   
623-277 1 Phoenix AZ   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2011-07-03   
623-277 2 Phoenix AZ   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2011-07-03   

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

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