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: 299

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-299 A Bullhead City AZ   612K CSC VOICE, LLC 666      
928-299 0 Bullhead City AZ GLVYAZXC2MD  6529 T-MOBILE USA, INC. 666   2015-03-30   
928-299 1 Bullhead City AZ GLVYAZXC2MD  6529 T-MOBILE USA, INC. 666   2015-02-06   
928-299 2 Bullhead City AZ   612K CSC VOICE, LLC 666   2014-04-07   
928-299 3 Bullhead City AZ   612K CSC VOICE, LLC 666   2014-04-07   
928-299 4 Bullhead City AZ   612K CSC VOICE, LLC 666   2014-04-07   
928-299 5 Bullhead City AZ   612K CSC VOICE, LLC 666   2014-04-07   
928-299 6 Bullhead City AZ GLVYAZXC2MD  6529 T-MOBILE USA, INC. 666   2014-10-26   
928-299 7 Bullhead City AZ PHNXAZUI8MD  508J CENTURYLINK COMMUNICATIONS, LLC 666   2016-06-09   
928-299 8 Bullhead City AZ KGMNAZXC7MD  6010 NEW CINGULAR WIRELESS PCS, LLC 666   2014-05-10   
928-299 9 Bullhead City AZ GLVYAZXC2MD  6529 T-MOBILE USA, INC. 666   2014-08-14   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.