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.

Switch: LTTNCOMADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-347 A Denver CO 9636 QWEST CORPORATION 656      
303-658 A Denver CO 9636 QWEST CORPORATION 656      
303-658 1 Denver CO 9636 QWEST CORPORATION 656      
303-658 5 Denver CO 9636 QWEST CORPORATION 656      
303-703 A Denver CO 9636 QWEST CORPORATION 656      
303-707 A Denver CO 9636 QWEST CORPORATION 656      
303-730 A Denver CO 9636 QWEST CORPORATION 656      
303-734 A Denver CO 9636 QWEST CORPORATION 656      
303-738 A Denver CO 9636 QWEST CORPORATION 656      
303-794 A Denver CO 9636 QWEST CORPORATION 656      
303-795 A Denver CO 9636 QWEST CORPORATION 656      
303-797 A Denver CO 9636 QWEST CORPORATION 656      
303-798 A Denver CO 9636 QWEST CORPORATION 656      
720-283 A Denver CO 9636 QWEST CORPORATION 656      
720-360 2 Denver CO 9636 QWEST CORPORATION 656   2013-03-23   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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