Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 623 [Rate centres in NPA 623] [Dial plan for NPA 623]

NXX: 632

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
623-632 A Phoenix AZ PHNXAZMAXQY  624H ONVOY SPECTRUM, LLC 666      
623-632 0 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-08-24   
623-632 1 Phoenix AZ   630E ONVOY, LLC - AZ 666   2020-08-24   
623-632 2 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2020-07-22   
623-632 3 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2020-07-22   
623-632 4 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2020-07-23   
623-632 5 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2020-07-23   
623-632 6 Phoenix AZ   624H ONVOY SPECTRUM, LLC 666   2020-07-22   
623-632 7 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2020-07-23   
623-632 8 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2020-07-23   
623-632 9 Phoenix AZ   6529 T-MOBILE USA, INC. 666   2020-07-23   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.