Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Window Rock, AZ

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
928-309 A STMCAZAB1MD  4146 SMITH BAGLEY INC. DBA CELLULAR ONE OF NE ARIZONA 980      
928-357 A STMCAZXEXMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 980      
928-357 0   6010 NEW CINGULAR WIRELESS PCS, LLC 980   2026-02-13   
928-357 6   3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 980   2019-12-30   
928-407 A STMCAZXE7MD  073H TELNYX LLC 980      
928-407 0   073H TELNYX LLC 980   2021-09-05   
928-810 A STMCAZXEDS0  4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      
928-810 0   4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      
928-810 2   4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      
928-810 3   4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      
928-810 4   4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      
928-810 5   4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      
928-810 7   4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      
928-810 8   4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      
928-810 9   6010 NEW CINGULAR WIRELESS PCS, LLC 980   2021-10-22   
928-815 A STMCAZXEPS1  4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      
928-815 4   4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980   2011-04-02   
928-871 A STMCAZXEDS0  4449 NAVAJO COMM CO INC - AZ DBA FRONTIER NAVAJO COM 980      

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

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