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: 865

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
303-865 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-865 0 Denver CO DNVRCOII4MD  5562 METROPCS, INC. 656      
303-865 1 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-865 2 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-865 3 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-865 4 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-865 5 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-865 6 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-865 7 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-865 8 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-865 9 Denver CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 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.