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
623-999 6 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2013-12-20   
623-999 7 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2013-12-20   
623-999 8 Phoenix AZ TEMPAZNR5MD  6529 T-MOBILE USA, INC. 666   2013-12-20   
623-999 9 Phoenix AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2013-11-21   

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Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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