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: 458 [Rate centres in NPA 458] [Dial plan for NPA 458]

NXX: 999

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
458-999 A Umatilla OR PTLDORWADS2  750E ONVOY, LLC - OR 672      
458-999 0 Umatilla OR   158H INVOXIO INCORPORATED 672   2018-11-16   
458-999 1 Umatilla OR   936F ASTOUND BROADBAND, LLC - OR 672   2017-12-02   
458-999 2 Umatilla OR   157F PEERLESS NETWORK OF OREGON, LLC - OR 672   2018-12-07   
458-999 3 Umatilla OR   750E ONVOY, LLC - OR 672   2019-01-24   
458-999 5 Umatilla OR   073H TELNYX LLC 672   2023-02-11   
458-999 6 Umatilla OR   7531 TELEPORT COMMUNICATIONS AMERICA, LLC - OR 672   2021-11-02   
458-999 7 Umatilla OR   157F PEERLESS NETWORK OF OREGON, LLC - OR 672   2021-10-18   
458-999 8 Umatilla OR   939H COMMIO, LLC 672   2022-11-21   
458-999 9 Umatilla OR   750E ONVOY, LLC - OR 672   2017-11-04   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.