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: 361

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
928-361 A Pima AZ TCSNAZMAXIX  587F BANDWIDTH.COM CLEC, LLC - AZ 668      
928-361 0 Pima AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2020-06-15   
928-361 1 Pima AZ   073H TELNYX LLC 668   2020-11-21   
928-361 2 Pima AZ   630E ONVOY, LLC - AZ 668   2020-09-10   
928-361 3 Pima AZ   630E ONVOY, LLC - AZ 668   2020-09-10   
928-361 4 Pima AZ   183D VALLEY CONNECTIONS, L.L.C. - AZ 668   2025-10-31   
928-361 5 Pima AZ   630E ONVOY, LLC - AZ 668   2021-01-15   
928-361 6 Pima AZ   630E ONVOY, LLC - AZ 668   2020-11-24   
928-361 7 Pima AZ   630E ONVOY, LLC - AZ 668   2021-01-15   
928-361 8 Pima AZ   579F PEERLESS NETWORK OF ARIZONA, LLC - AZ 668   2021-01-03   
928-361 9 Pima AZ   587F BANDWIDTH.COM CLEC, LLC - AZ 668   2020-09-14   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.