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: LKWDCOMADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-202 A Denver CO 9636 QWEST CORPORATION 656      
303-205 A Denver CO 9636 QWEST CORPORATION 656      
303-231 A Denver CO 9636 QWEST CORPORATION 656      
303-232 A Denver CO 9636 QWEST CORPORATION 656      
303-233 A Denver CO 9636 QWEST CORPORATION 656      
303-234 A Denver CO 9636 QWEST CORPORATION 656      
303-235 A Denver CO 9636 QWEST CORPORATION 656      
303-236 A Denver CO 9636 QWEST CORPORATION 656      
303-237 A Denver CO 9636 QWEST CORPORATION 656      
303-238 A Denver CO 9636 QWEST CORPORATION 656      
303-239 A Denver CO 9636 QWEST CORPORATION 656      
303-274 A Denver CO 9636 QWEST CORPORATION 656      
303-275 A Denver CO 9636 QWEST CORPORATION 656      
303-445 A Denver CO 9636 QWEST CORPORATION 656      
303-462 A Denver CO 9636 QWEST CORPORATION 656      
720-321 A Denver CO 9636 QWEST CORPORATION 656      
720-544 A Denver CO 9636 QWEST CORPORATION 656      
720-544 0 Denver CO 9636 QWEST CORPORATION 656      
720-544 2 Denver CO 9636 QWEST CORPORATION 656      
720-544 4 Denver CO 9636 QWEST CORPORATION 656      
720-544 5 Denver CO 9636 QWEST CORPORATION 656      
720-544 8 Denver CO 9636 QWEST CORPORATION 656      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.