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: 857

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-857 A Cibola AZ CIBLAZXCRL0  4419 FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - AZ 730      
928-857 1 Cibola AZ LSANCARCD3S  630E ONVOY, LLC - AZ 730      
928-857 2 Cibola AZ LSANCA039MD  587F BANDWIDTH.COM CLEC, LLC - AZ 730      
928-857 3 Cibola AZ CIBLAZXCRL0  4419 FRONTIER COMMUNICATIONS OF THE SOUTHWEST INC. - AZ 730      
928-857 4 Cibola AZ LSANCA039MD  587F BANDWIDTH.COM CLEC, LLC - AZ 730      
928-857 5 Cibola AZ LSANCARCD3S  630E ONVOY, LLC - AZ 730      
928-857 6 Cibola AZ LSANCARCD3S  630E ONVOY, LLC - AZ 730      
928-857 7 Cibola AZ LSANCARCD3S  630E ONVOY, LLC - AZ 730      
928-857 8 Cibola AZ LSANCARCD3S  630E ONVOY, LLC - AZ 730      
928-857 9 Cibola AZ VTVLCAXAX0Y  624H ONVOY SPECTRUM, LLC 730      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.