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: TEMACOMADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-494 A Denver CO 9636 QWEST CORPORATION 656      
303-497 A Denver CO 9636 QWEST CORPORATION 656      
303-499 A Denver CO 9636 QWEST CORPORATION 656      
303-543 A Denver CO 9636 QWEST CORPORATION 656      
303-554 A Denver CO 9636 QWEST CORPORATION 656      
720-304 A Denver CO 9636 QWEST CORPORATION 656      
720-304 0 Denver CO 9636 QWEST CORPORATION 656      
720-304 1 Denver CO 9636 QWEST CORPORATION 656      
720-304 2 Denver CO 9636 QWEST CORPORATION 656      
720-304 3 Denver CO 9636 QWEST CORPORATION 656      
720-304 4 Denver CO 9636 QWEST CORPORATION 656      
720-304 6 Denver CO 9636 QWEST CORPORATION 656      
720-304 7 Denver CO 9636 QWEST CORPORATION 656      
720-304 8 Denver CO 9636 QWEST CORPORATION 656      
720-304 9 Denver CO 9636 QWEST CORPORATION 656      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.