Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 303 [Rate centres in NPA 303] [Dial plan for NPA 303]

NXX: 954

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
303-954 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-954 0 Denver CO   318J COMCAST IP PHONE, LLC 656   2006-07-31   
303-954 1 Denver CO   9636 QWEST CORPORATION 656   2005-10-28   
303-954 2 Denver CO   9636 QWEST CORPORATION 656   2005-10-28   
303-954 3 Denver CO   9636 QWEST CORPORATION 656   2005-10-28   
303-954 4 Denver CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-954 5 Denver CO   9636 QWEST CORPORATION 656   2005-10-28   
303-954 6 Denver CO   9636 QWEST CORPORATION 656   2005-10-28   
303-954 7 Denver CO   9636 QWEST CORPORATION 656   2005-10-28   
303-954 8 Denver CO   318J COMCAST IP PHONE, LLC 656   2006-07-31   
303-954 9 Denver CO   318J COMCAST IP PHONE, LLC 656   2006-07-31   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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