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: 303 [Rate centres in NPA 303] [Dial plan for NPA 303]

NXX: 642

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
303-642 A Denver CO CCCNCOMADS0  9636 QWEST CORPORATION 656      
303-642 0 Denver CO CCCNCOMADS0  9636 QWEST CORPORATION 656      
303-642 1 Denver CO CCCNCOMADS0  9636 QWEST CORPORATION 656      
303-642 2 Denver CO CCCNCOMADS0  9636 QWEST CORPORATION 656      
303-642 3 Denver CO CCCNCOMADS0  9636 QWEST CORPORATION 656      
303-642 4 Denver CO CCCNCOMADS0  9636 QWEST CORPORATION 656      
303-642 5 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2006-08-05   
303-642 6 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2006-08-05   
303-642 7 Denver CO CCCNCOMADS0  9636 QWEST CORPORATION 656      
303-642 8 Denver CO CCCNCOMADS0  9636 QWEST CORPORATION 656      
303-642 9 Denver CO CCCNCOMADS0  9636 QWEST CORPORATION 656      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.