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: 928 [Rate centres in NPA 928] [Dial plan for NPA 928]

NXX: 663

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-663 A Chinle AZ   700J WAVENATION, LLC 980      
928-663 0 Chinle AZ STMCAZXE5MD  5736 COMMNET WIRELESS, LLC 980   2016-04-28   
928-663 1 Chinle AZ   700J WAVENATION, LLC 980   2025-09-29   
928-663 8 Chinle AZ STMCAZXE6MD  6010 NEW CINGULAR WIRELESS PCS, LLC 980   2023-03-15   
928-663 9 Chinle AZ STMCAZXE6MD  6010 NEW CINGULAR WIRELESS PCS, LLC 980   2023-03-15   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.