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: DNVRCOEADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-270 A Denver CO 9636 QWEST CORPORATION 656      
303-314 A Denver CO 9636 QWEST CORPORATION 656      
303-315 A Denver CO 9636 QWEST CORPORATION 656      
303-316 A Denver CO 9636 QWEST CORPORATION 656      
303-320 A Denver CO 9636 QWEST CORPORATION 656      
303-321 A Denver CO 9636 QWEST CORPORATION 656      
303-322 A Denver CO 9636 QWEST CORPORATION 656      
303-329 A Denver CO 9636 QWEST CORPORATION 656      
303-331 A Denver CO 9636 QWEST CORPORATION 656      
303-333 A Denver CO 9636 QWEST CORPORATION 656      
303-336 A Denver CO 9636 QWEST CORPORATION 656      
303-355 A Denver CO 9636 QWEST CORPORATION 656      
303-370 A Denver CO 9636 QWEST CORPORATION 656      
303-372 A Denver CO 9636 QWEST CORPORATION 656      
303-377 A Denver CO 9636 QWEST CORPORATION 656      
303-388 A Denver CO 9636 QWEST CORPORATION 656      
303-393 A Denver CO 9636 QWEST CORPORATION 656      
303-394 A Denver CO 9636 QWEST CORPORATION 656      
303-398 A Denver CO 9636 QWEST CORPORATION 656      
303-399 A Denver CO 9636 QWEST CORPORATION 656      
303-780 A Denver CO 9636 QWEST CORPORATION 656      
720-941 A Denver CO 9636 QWEST CORPORATION 656      
720-942 A Denver CO 9636 QWEST CORPORATION 656      
720-945 A Denver CO 9636 QWEST CORPORATION 656      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

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