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: 366

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-366 A Yuma AZ PHNZAZZJAMD  6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666      
928-366 0 Yuma AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2010-05-09   
928-366 1 Yuma AZ   793K TWC IP ENABLED SERVICES, LLC 666   2012-02-09   
928-366 2 Yuma AZ   630E ONVOY, LLC - AZ 666   2010-05-11   
928-366 3 Yuma AZ   6529 T-MOBILE USA, INC. 666   2012-03-05   
928-366 4 Yuma AZ   6529 T-MOBILE USA, INC. 666   2012-03-05   
928-366 5 Yuma AZ   630E ONVOY, LLC - AZ 666   2012-01-23   
928-366 6 Yuma AZ   6529 T-MOBILE USA, INC. 666   2012-04-02   
928-366 7 Yuma AZ   6529 T-MOBILE USA, INC. 666   2011-01-17   
928-366 8 Yuma AZ   6529 T-MOBILE USA, INC. 666   2011-01-17   
928-366 9 Yuma AZ   6529 T-MOBILE USA, INC. 666   2011-01-17   

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.