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: 381

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-381 A Grand Canyon AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666      
928-381 0 Grand Canyon AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2021-08-08   
928-381 1 Grand Canyon AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2021-02-19   
928-381 2 Grand Canyon AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2021-02-19   
928-381 3 Grand Canyon AZ PHNXAZ28DS3  630E ONVOY, LLC - AZ 666   2021-07-04   
928-381 4 Grand Canyon AZ PHNXAZMAXQY  624H ONVOY SPECTRUM, LLC 666   2021-11-01   
928-381 5 Grand Canyon AZ   515J IP HORIZON LLC 666   2021-10-01   
928-381 6 Grand Canyon AZ PHNXAZMAXQY  624H ONVOY SPECTRUM, LLC 666   2021-07-24   
928-381 7 Grand Canyon AZ PHNXAZMAXQY  624H ONVOY SPECTRUM, LLC 666   2021-09-26   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.