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: 220

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-220 A Flagstaff AZ TEMPAZNR5MD  5562 METROPCS, INC. 666      
928-220 0 Flagstaff AZ   6529 T-MOBILE USA, INC. 666      
928-220 1 Flagstaff AZ   5562 METROPCS, INC. 666      
928-220 2 Flagstaff AZ   5562 METROPCS, INC. 666   2015-01-09   
928-220 3 Flagstaff AZ   630E ONVOY, LLC - AZ 666   2016-04-22   
928-220 4 Flagstaff AZ   630E ONVOY, LLC - AZ 666   2016-04-22   
928-220 5 Flagstaff AZ   6572 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 666   2009-10-03   
928-220 6 Flagstaff AZ   630E ONVOY, LLC - AZ 666   2016-02-25   
928-220 7 Flagstaff AZ   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 666   2013-10-30   
928-220 8 Flagstaff AZ   630E ONVOY, LLC - AZ 666   2009-08-29   
928-220 9 Flagstaff AZ   630E ONVOY, LLC - AZ 666   2016-02-25   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.