Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
720-491 3 Longmont CO 318J COMCAST IP PHONE, LLC 656   2012-01-03   
720-502 A Denver CO 318J COMCAST IP PHONE, LLC 656      
720-502 2 Denver CO 318J COMCAST IP PHONE, LLC 656   2013-01-12   
720-502 3 Denver CO 318J COMCAST IP PHONE, LLC 656   2013-01-15   
720-502 4 Denver CO 318J COMCAST IP PHONE, LLC 656   2013-01-15   
720-502 5 Denver CO 318J COMCAST IP PHONE, LLC 656   2013-01-15   
720-502 6 Denver CO 318J COMCAST IP PHONE, LLC 656   2013-01-15   
720-502 7 Denver CO 318J COMCAST IP PHONE, LLC 656   2013-01-15   
720-508 3 Denver CO 318J COMCAST IP PHONE, LLC 656   2012-08-24   
720-508 4 Denver CO 318J COMCAST IP PHONE, LLC 656   2012-08-24   
720-510 A Denver CO 318J COMCAST IP PHONE, LLC 656      
720-510 1 Denver CO 318J COMCAST IP PHONE, LLC 656   2017-07-26   
720-510 2 Denver CO 318J COMCAST IP PHONE, LLC 656   2017-07-26   
720-510 3 Denver CO 318J COMCAST IP PHONE, LLC 656   2017-07-26   
720-510 8 Denver CO 318J COMCAST IP PHONE, LLC 656   2017-07-31   
720-510 9 Denver CO 318J COMCAST IP PHONE, LLC 656   2017-07-31   
720-512 A Denver CO 318J COMCAST IP PHONE, LLC 656      
720-512 2 Denver CO 318J COMCAST IP PHONE, LLC 656   2016-06-23   
720-512 3 Denver CO 318J COMCAST IP PHONE, LLC 656   2016-06-23   
720-512 4 Denver CO 318J COMCAST IP PHONE, LLC 656   2016-06-23   
720-512 5 Denver CO 318J COMCAST IP PHONE, LLC 656   2016-06-23   
720-519 0 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-519 1 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-524 3 Denver CO 318J COMCAST IP PHONE, LLC 656   2007-09-21   
720-524 4 Denver CO 318J COMCAST IP PHONE, LLC 656   2007-09-21   
720-524 6 Denver CO 318J COMCAST IP PHONE, LLC 656   2007-09-21   
720-524 7 Denver CO 318J COMCAST IP PHONE, LLC 656   2007-09-21   
720-524 8 Denver CO 318J COMCAST IP PHONE, LLC 656   2007-09-21   
720-526 6 Longmont CO 318J COMCAST IP PHONE, LLC 656   2014-07-29   
720-531 A Denver CO 318J COMCAST IP PHONE, LLC 656      
720-531 2 Denver CO 318J COMCAST IP PHONE, LLC 656   2016-09-30   
720-531 3 Denver CO 318J COMCAST IP PHONE, LLC 656   2016-09-30   
720-531 4 Denver CO 318J COMCAST IP PHONE, LLC 656   2016-09-30   
720-531 5 Denver CO 318J COMCAST IP PHONE, LLC 656   2016-09-30   
720-532 0 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-532 1 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-532 8 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-535 1 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-535 4 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-535 5 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-535 6 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-535 7 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-535 8 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-535 9 Denver CO 318J COMCAST IP PHONE, LLC 656      
720-536 5 Denver CO 318J COMCAST IP PHONE, LLC 656   2007-09-21   
720-536 8 Denver CO 318J COMCAST IP PHONE, LLC 656   2007-09-21   
720-541 6 Denver CO 318J COMCAST IP PHONE, LLC 656   2012-12-01   
720-541 7 Denver CO 318J COMCAST IP PHONE, LLC 656   2012-12-01   
720-542 3 Denver CO 318J COMCAST IP PHONE, LLC 656   2007-09-21   
720-542 8 Denver CO 318J COMCAST IP PHONE, LLC 656   2007-09-21   

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Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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