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: 689

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
303-689 A Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-689 0 Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-689 1 Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-689 2 Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-689 3 Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-689 4 Denver CO DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-689 5 Denver CO DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-689 6 Denver CO DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-689 7 Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-689 8 Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-689 9 Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.