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: 676

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
303-676 A Denver CO AURRCOMADS0  9636 QWEST CORPORATION 656      
303-676 0 Denver CO AURRCOMADS0  9636 QWEST CORPORATION 656      
303-676 1 Denver CO AURRCOMADS0  9636 QWEST CORPORATION 656      
303-676 2 Denver CO AURRCOMADS0  9636 QWEST CORPORATION 656      
303-676 3 Denver CO AURRCOMADS0  9636 QWEST CORPORATION 656      
303-676 4 Denver CO AURRCOMADS0  9636 QWEST CORPORATION 656      
303-676 5 Denver CO AURRCOMADS0  9636 QWEST CORPORATION 656      
303-676 6 Denver CO AURRCOMADS0  9636 QWEST CORPORATION 656      
303-676 7 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-676 8 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-676 9 Denver CO AURRCOMADS0  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.