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]

NXX: 254

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-254 A Phoenix AZ TEMPAZNR5MD  5562 METROPCS, INC. 666      
623-254 0 Phoenix AZ   508J CENTURYLINK COMMUNICATIONS, LLC 666   2020-04-27   
623-254 1 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-05-29   
623-254 2 Phoenix AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2020-04-27   
623-254 3 Phoenix AZ   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 666   2020-04-27   
623-254 4 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-05-29   
623-254 5 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-05-29   
623-254 6 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-05-29   
623-254 7 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-05-29   
623-254 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2021-05-13   
623-254 9 Phoenix AZ   5562 METROPCS, INC. 666   2020-04-26   

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

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