Local Calling Guide

Area code/prefix search

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
303-409 5 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-493 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-493 3 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-493 4 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-515 8 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2012-02-17   
303-801 3 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2011-06-21   
303-802 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-802 1 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-802 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-803 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-803 1 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-803 9 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-834 4 Longmont CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2008-05-31   
303-957 9 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
303-999 4 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2008-05-07   
720-225 1 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2003-01-11   
720-225 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2003-01-11   
720-225 3 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2003-01-11   
720-225 4 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2003-01-11   
720-225 5 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2003-01-11   
720-225 6 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2003-01-11   
720-245 6 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2012-01-06   
720-278 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-278 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-279 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-279 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-279 3 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-279 5 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-279 6 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2002-07-09   
720-282 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-282 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-282 8 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2010-05-22   
720-305 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-305 0 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-347 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-347 4 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2009-11-12   
720-347 6 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2009-11-12   
720-354 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-354 3 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2011-08-21   
720-372 5 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2014-04-18   
720-387 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-387 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2012-10-26   
720-387 3 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2012-10-26   
720-387 4 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2012-10-26   
720-393 A Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-393 1 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2010-07-29   
720-393 2 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2010-07-29   
720-393 3 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2010-07-29   
720-393 4 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2010-07-29   
720-393 5 Denver CO 4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2010-07-29   

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Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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