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: 970 [Rate centres in NPA 970] [Dial plan for NPA 970]

NXX: 284

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
970-284 A La Salle CO LSLLCOMARS1  9636 QWEST CORPORATION 656      
970-284 0 La Salle CO   9636 QWEST CORPORATION 656      
970-284 1 La Salle CO   9636 QWEST CORPORATION 656      
970-284 2 La Salle CO   318J COMCAST IP PHONE, LLC 656   2006-03-02   
970-284 3 La Salle CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2006-03-08   
970-284 4 La Salle CO   278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2024-02-20   
970-284 5 La Salle CO   9636 QWEST CORPORATION 656      
970-284 6 La Salle CO   9636 QWEST CORPORATION 656      
970-284 7 La Salle CO   9636 QWEST CORPORATION 656      
970-284 8 La Salle CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2004-11-11   
970-284 9 La Salle CO   9636 QWEST CORPORATION 656      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.