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: 515

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
303-515 A Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-515 0 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-515 1 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-515 2 Denver CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
303-515 3 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-515 4 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-515 5 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-515 6 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-515 7 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-515 8 Denver CO AURSCOFWDS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-515 9 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.