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: 280

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-280 A Tuba City AZ   6010 NEW CINGULAR WIRELESS PCS, LLC 980      
928-280 7 Tuba City AZ STMCAZXEXMD  3285 LEVEL 3 COMMUNICATIONS, LLC - AZ 980   2020-03-27   
928-280 8 Tuba City AZ STMCAZXE6MD  6010 NEW CINGULAR WIRELESS PCS, LLC 980   2021-10-22   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.