Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 720 [Rate centres in NPA 720] [Dial plan for NPA 720]

NXX: 789

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-789 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-789 0 Denver CO   6529 T-MOBILE USA, INC. 656   2011-10-07   
720-789 1 Denver CO   6529 T-MOBILE USA, INC. 656   2011-10-07   
720-789 2 Denver CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2012-05-19   
720-789 3 Denver CO   6529 T-MOBILE USA, INC. 656   2011-10-07   
720-789 4 Denver CO   6529 T-MOBILE USA, INC. 656   2011-10-07   
720-789 5 Denver CO   026D ONVOY, LLC - CO 656   2012-08-28   
720-789 6 Denver CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2012-11-15   
720-789 7 Denver CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2013-02-28   
720-789 8 Denver CO   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2012-06-30   
720-789 9 Denver CO   5562 METROPCS, INC. 656   2013-11-11   

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

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